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Symbol : {};\n var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n function define(obj, key, value) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n return obj[key];\n }\n try {\n // IE 8 has a broken Object.defineProperty that only works on DOM objects.\n define({}, \"\");\n } catch (err) {\n define = function(obj, key, value) {\n return obj[key] = value;\n };\n }\n\n function wrap(innerFn, outerFn, self, tryLocsList) {\n // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n var generator = Object.create(protoGenerator.prototype);\n var context = new Context(tryLocsList || []);\n\n // The ._invoke method unifies the implementations of the .next,\n // .throw, and .return methods.\n generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n return generator;\n }\n exports.wrap = wrap;\n\n // Try/catch helper to minimize deoptimizations. Returns a completion\n // record like context.tryEntries[i].completion. This interface could\n // have been (and was previously) designed to take a closure to be\n // invoked without arguments, but in all the cases we care about we\n // already have an existing method we want to call, so there's no need\n // to create a new function object. We can even get away with assuming\n // the method takes exactly one argument, since that happens to be true\n // in every case, so we don't have to touch the arguments object. The\n // only additional allocation required is the completion record, which\n // has a stable shape and so hopefully should be cheap to allocate.\n function tryCatch(fn, obj, arg) {\n try {\n return { type: \"normal\", arg: fn.call(obj, arg) };\n } catch (err) {\n return { type: \"throw\", arg: err };\n }\n }\n\n var GenStateSuspendedStart = \"suspendedStart\";\n var GenStateSuspendedYield = \"suspendedYield\";\n var GenStateExecuting = \"executing\";\n var GenStateCompleted = \"completed\";\n\n // Returning this object from the innerFn has the same effect as\n // breaking out of the dispatch switch statement.\n var ContinueSentinel = {};\n\n // Dummy constructor functions that we use as the .constructor and\n // .constructor.prototype properties for functions that return Generator\n // objects. For full spec compliance, you may wish to configure your\n // minifier not to mangle the names of these two functions.\n function Generator() {}\n function GeneratorFunction() {}\n function GeneratorFunctionPrototype() {}\n\n // This is a polyfill for %IteratorPrototype% for environments that\n // don't natively support it.\n var IteratorPrototype = {};\n IteratorPrototype[iteratorSymbol] = function () {\n return this;\n };\n\n var getProto = Object.getPrototypeOf;\n var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n if (NativeIteratorPrototype &&\n NativeIteratorPrototype !== Op &&\n hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n // This environment has a native %IteratorPrototype%; use it instead\n // of the polyfill.\n IteratorPrototype = NativeIteratorPrototype;\n }\n\n var Gp = GeneratorFunctionPrototype.prototype =\n Generator.prototype = Object.create(IteratorPrototype);\n GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n GeneratorFunctionPrototype.constructor = GeneratorFunction;\n GeneratorFunction.displayName = define(\n GeneratorFunctionPrototype,\n toStringTagSymbol,\n \"GeneratorFunction\"\n );\n\n // Helper for defining the .next, .throw, and .return methods of the\n // Iterator interface in terms of a single ._invoke method.\n function defineIteratorMethods(prototype) {\n [\"next\", \"throw\", \"return\"].forEach(function(method) {\n define(prototype, method, function(arg) {\n return this._invoke(method, arg);\n });\n });\n }\n\n exports.isGeneratorFunction = function(genFun) {\n var ctor = typeof genFun === \"function\" && genFun.constructor;\n return ctor\n ? ctor === GeneratorFunction ||\n // For the native GeneratorFunction constructor, the best we can\n // do is to check its .name property.\n (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n : false;\n };\n\n exports.mark = function(genFun) {\n if (Object.setPrototypeOf) {\n Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n } else {\n genFun.__proto__ = GeneratorFunctionPrototype;\n define(genFun, toStringTagSymbol, \"GeneratorFunction\");\n }\n genFun.prototype = Object.create(Gp);\n return genFun;\n };\n\n // Within the body of any async function, `await x` is transformed to\n // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n // meant to be awaited.\n exports.awrap = function(arg) {\n return { __await: arg };\n };\n\n function AsyncIterator(generator, PromiseImpl) {\n function invoke(method, arg, resolve, reject) {\n var record = tryCatch(generator[method], generator, arg);\n if (record.type === \"throw\") {\n reject(record.arg);\n } else {\n var result = record.arg;\n var value = result.value;\n if (value &&\n typeof value === \"object\" &&\n hasOwn.call(value, \"__await\")) {\n return PromiseImpl.resolve(value.__await).then(function(value) {\n invoke(\"next\", value, resolve, reject);\n }, function(err) {\n invoke(\"throw\", err, resolve, reject);\n });\n }\n\n return PromiseImpl.resolve(value).then(function(unwrapped) {\n // When a yielded Promise is resolved, its final value becomes\n // the .value of the Promise<{value,done}> result for the\n // current iteration.\n result.value = unwrapped;\n resolve(result);\n }, function(error) {\n // If a rejected Promise was yielded, throw the rejection back\n // into the async generator function so it can be handled there.\n return invoke(\"throw\", error, resolve, reject);\n });\n }\n }\n\n var previousPromise;\n\n function enqueue(method, arg) {\n function callInvokeWithMethodAndArg() {\n return new PromiseImpl(function(resolve, reject) {\n invoke(method, arg, resolve, reject);\n });\n }\n\n return previousPromise =\n // If enqueue has been called before, then we want to wait until\n // all previous Promises have been resolved before calling invoke,\n // so that results are always delivered in the correct order. If\n // enqueue has not been called before, then it is important to\n // call invoke immediately, without waiting on a callback to fire,\n // so that the async generator function has the opportunity to do\n // any necessary setup in a predictable way. This predictability\n // is why the Promise constructor synchronously invokes its\n // executor callback, and why async functions synchronously\n // execute code before the first await. Since we implement simple\n // async functions in terms of async generators, it is especially\n // important to get this right, even though it requires care.\n previousPromise ? previousPromise.then(\n callInvokeWithMethodAndArg,\n // Avoid propagating failures to Promises returned by later\n // invocations of the iterator.\n callInvokeWithMethodAndArg\n ) : callInvokeWithMethodAndArg();\n }\n\n // Define the unified helper method that is used to implement .next,\n // .throw, and .return (see defineIteratorMethods).\n this._invoke = enqueue;\n }\n\n defineIteratorMethods(AsyncIterator.prototype);\n AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n return this;\n };\n exports.AsyncIterator = AsyncIterator;\n\n // Note that simple async functions are implemented on top of\n // AsyncIterator objects; they just return a Promise for the value of\n // the final result produced by the iterator.\n exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {\n if (PromiseImpl === void 0) PromiseImpl = Promise;\n\n var iter = new AsyncIterator(\n wrap(innerFn, outerFn, self, tryLocsList),\n PromiseImpl\n );\n\n return exports.isGeneratorFunction(outerFn)\n ? iter // If outerFn is a generator, return the full iterator.\n : iter.next().then(function(result) {\n return result.done ? result.value : iter.next();\n });\n };\n\n function makeInvokeMethod(innerFn, self, context) {\n var state = GenStateSuspendedStart;\n\n return function invoke(method, arg) {\n if (state === GenStateExecuting) {\n throw new Error(\"Generator is already running\");\n }\n\n if (state === GenStateCompleted) {\n if (method === \"throw\") {\n throw arg;\n }\n\n // Be forgiving, per 25.3.3.3.3 of the spec:\n // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n return doneResult();\n }\n\n context.method = method;\n context.arg = arg;\n\n while (true) {\n var delegate = context.delegate;\n if (delegate) {\n var delegateResult = maybeInvokeDelegate(delegate, context);\n if (delegateResult) {\n if (delegateResult === ContinueSentinel) continue;\n return delegateResult;\n }\n }\n\n if (context.method === \"next\") {\n // Setting context._sent for legacy support of Babel's\n // function.sent implementation.\n context.sent = context._sent = context.arg;\n\n } else if (context.method === \"throw\") {\n if (state === GenStateSuspendedStart) {\n state = GenStateCompleted;\n throw context.arg;\n }\n\n context.dispatchException(context.arg);\n\n } else if (context.method === \"return\") {\n context.abrupt(\"return\", context.arg);\n }\n\n state = GenStateExecuting;\n\n var record = tryCatch(innerFn, self, context);\n if (record.type === \"normal\") {\n // If an exception is thrown from innerFn, we leave state ===\n // GenStateExecuting and loop back for another invocation.\n state = context.done\n ? GenStateCompleted\n : GenStateSuspendedYield;\n\n if (record.arg === ContinueSentinel) {\n continue;\n }\n\n return {\n value: record.arg,\n done: context.done\n };\n\n } else if (record.type === \"throw\") {\n state = GenStateCompleted;\n // Dispatch the exception by looping back around to the\n // context.dispatchException(context.arg) call above.\n context.method = \"throw\";\n context.arg = record.arg;\n }\n }\n };\n }\n\n // Call delegate.iterator[context.method](context.arg) and handle the\n // result, either by returning a { value, done } result from the\n // delegate iterator, or by modifying context.method and context.arg,\n // setting context.delegate to null, and returning the ContinueSentinel.\n function maybeInvokeDelegate(delegate, context) {\n var method = delegate.iterator[context.method];\n if (method === undefined) {\n // A .throw or .return when the delegate iterator has no .throw\n // method always terminates the yield* loop.\n context.delegate = null;\n\n if (context.method === \"throw\") {\n // Note: [\"return\"] must be used for ES3 parsing compatibility.\n if (delegate.iterator[\"return\"]) {\n // If the delegate iterator has a return method, give it a\n // chance to clean up.\n context.method = \"return\";\n context.arg = undefined;\n maybeInvokeDelegate(delegate, context);\n\n if (context.method === \"throw\") {\n // If maybeInvokeDelegate(context) changed context.method from\n // \"return\" to \"throw\", let that override the TypeError below.\n return ContinueSentinel;\n }\n }\n\n context.method = \"throw\";\n context.arg = new TypeError(\n \"The iterator does not provide a 'throw' method\");\n }\n\n return ContinueSentinel;\n }\n\n var record = tryCatch(method, delegate.iterator, context.arg);\n\n if (record.type === \"throw\") {\n context.method = \"throw\";\n context.arg = record.arg;\n context.delegate = null;\n return ContinueSentinel;\n }\n\n var info = record.arg;\n\n if (! info) {\n context.method = \"throw\";\n context.arg = new TypeError(\"iterator result is not an object\");\n context.delegate = null;\n return ContinueSentinel;\n }\n\n if (info.done) {\n // Assign the result of the finished delegate to the temporary\n // variable specified by delegate.resultName (see delegateYield).\n context[delegate.resultName] = info.value;\n\n // Resume execution at the desired location (see delegateYield).\n context.next = delegate.nextLoc;\n\n // If context.method was \"throw\" but the delegate handled the\n // exception, let the outer generator proceed normally. If\n // context.method was \"next\", forget context.arg since it has been\n // \"consumed\" by the delegate iterator. If context.method was\n // \"return\", allow the original .return call to continue in the\n // outer generator.\n if (context.method !== \"return\") {\n context.method = \"next\";\n context.arg = undefined;\n }\n\n } else {\n // Re-yield the result returned by the delegate method.\n return info;\n }\n\n // The delegate iterator is finished, so forget it and continue with\n // the outer generator.\n context.delegate = null;\n return ContinueSentinel;\n }\n\n // Define Generator.prototype.{next,throw,return} in terms of the\n // unified ._invoke helper method.\n defineIteratorMethods(Gp);\n\n define(Gp, toStringTagSymbol, \"Generator\");\n\n // A Generator should always return itself as the iterator object when the\n // @@iterator function is called on it. Some browsers' implementations of the\n // iterator prototype chain incorrectly implement this, causing the Generator\n // object to not be returned from this call. This ensures that doesn't happen.\n // See https://github.com/facebook/regenerator/issues/274 for more details.\n Gp[iteratorSymbol] = function() {\n return this;\n };\n\n Gp.toString = function() {\n return \"[object Generator]\";\n };\n\n function pushTryEntry(locs) {\n var entry = { tryLoc: locs[0] };\n\n if (1 in locs) {\n entry.catchLoc = locs[1];\n }\n\n if (2 in locs) {\n entry.finallyLoc = locs[2];\n entry.afterLoc = locs[3];\n }\n\n this.tryEntries.push(entry);\n }\n\n function resetTryEntry(entry) {\n var record = entry.completion || {};\n record.type = \"normal\";\n delete record.arg;\n entry.completion = record;\n }\n\n function Context(tryLocsList) {\n // The root entry object (effectively a try statement without a catch\n // or a finally block) gives us a place to store values thrown from\n // locations where there is no enclosing try statement.\n this.tryEntries = [{ tryLoc: \"root\" }];\n tryLocsList.forEach(pushTryEntry, this);\n this.reset(true);\n }\n\n exports.keys = function(object) {\n var keys = [];\n for (var key in object) {\n keys.push(key);\n }\n keys.reverse();\n\n // Rather than returning an object with a next method, we keep\n // things simple and return the next function itself.\n return function next() {\n while (keys.length) {\n var key = keys.pop();\n if (key in object) {\n next.value = key;\n next.done = false;\n return next;\n }\n }\n\n // To avoid creating an additional object, we just hang the .value\n // and .done properties off the next function object itself. This\n // also ensures that the minifier will not anonymize the function.\n next.done = true;\n return next;\n };\n };\n\n function values(iterable) {\n if (iterable) {\n var iteratorMethod = iterable[iteratorSymbol];\n if (iteratorMethod) {\n return iteratorMethod.call(iterable);\n }\n\n if (typeof iterable.next === \"function\") {\n return iterable;\n }\n\n if (!isNaN(iterable.length)) {\n var i = -1, next = function next() {\n while (++i < iterable.length) {\n if (hasOwn.call(iterable, i)) {\n next.value = iterable[i];\n next.done = false;\n return next;\n }\n }\n\n next.value = undefined;\n next.done = true;\n\n return next;\n };\n\n return next.next = next;\n }\n }\n\n // Return an iterator with no values.\n return { next: doneResult };\n }\n exports.values = values;\n\n function doneResult() {\n return { value: undefined, done: true };\n }\n\n Context.prototype = {\n constructor: Context,\n\n reset: function(skipTempReset) {\n this.prev = 0;\n this.next = 0;\n // Resetting context._sent for legacy support of Babel's\n // function.sent implementation.\n this.sent = this._sent = undefined;\n this.done = false;\n this.delegate = null;\n\n this.method = \"next\";\n this.arg = undefined;\n\n this.tryEntries.forEach(resetTryEntry);\n\n if (!skipTempReset) {\n for (var name in this) {\n // Not sure about the optimal order of these conditions:\n if (name.charAt(0) === \"t\" &&\n hasOwn.call(this, name) &&\n !isNaN(+name.slice(1))) {\n this[name] = undefined;\n }\n }\n }\n },\n\n stop: function() {\n this.done = true;\n\n var rootEntry = this.tryEntries[0];\n var rootRecord = rootEntry.completion;\n if (rootRecord.type === \"throw\") {\n throw rootRecord.arg;\n }\n\n return this.rval;\n },\n\n dispatchException: function(exception) {\n if (this.done) {\n throw exception;\n }\n\n var context = this;\n function handle(loc, caught) {\n record.type = \"throw\";\n record.arg = exception;\n context.next = loc;\n\n if (caught) {\n // If the dispatched exception was caught by a catch block,\n // then let that catch block handle the exception normally.\n context.method = \"next\";\n context.arg = undefined;\n }\n\n return !! caught;\n }\n\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n var record = entry.completion;\n\n if (entry.tryLoc === \"root\") {\n // Exception thrown outside of any try block that could handle\n // it, so set the completion value of the entire function to\n // throw the exception.\n return handle(\"end\");\n }\n\n if (entry.tryLoc <= this.prev) {\n var hasCatch = hasOwn.call(entry, \"catchLoc\");\n var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n if (hasCatch && hasFinally) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n } else if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else if (hasCatch) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n }\n\n } else if (hasFinally) {\n if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else {\n throw new Error(\"try statement without catch or finally\");\n }\n }\n }\n },\n\n abrupt: function(type, arg) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.tryLoc <= this.prev &&\n hasOwn.call(entry, \"finallyLoc\") &&\n this.prev < entry.finallyLoc) {\n var finallyEntry = entry;\n break;\n }\n }\n\n if (finallyEntry &&\n (type === \"break\" ||\n type === \"continue\") &&\n finallyEntry.tryLoc <= arg &&\n arg <= finallyEntry.finallyLoc) {\n // Ignore the finally entry if control is not jumping to a\n // location outside the try/catch block.\n finallyEntry = null;\n }\n\n var record = finallyEntry ? finallyEntry.completion : {};\n record.type = type;\n record.arg = arg;\n\n if (finallyEntry) {\n this.method = \"next\";\n this.next = finallyEntry.finallyLoc;\n return ContinueSentinel;\n }\n\n return this.complete(record);\n },\n\n complete: function(record, afterLoc) {\n if (record.type === \"throw\") {\n throw record.arg;\n }\n\n if (record.type === \"break\" ||\n record.type === \"continue\") {\n this.next = record.arg;\n } else if (record.type === \"return\") {\n this.rval = this.arg = record.arg;\n this.method = \"return\";\n this.next = \"end\";\n } else if (record.type === \"normal\" && afterLoc) {\n this.next = afterLoc;\n }\n\n return ContinueSentinel;\n },\n\n finish: function(finallyLoc) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.finallyLoc === finallyLoc) {\n this.complete(entry.completion, entry.afterLoc);\n resetTryEntry(entry);\n return ContinueSentinel;\n }\n }\n },\n\n \"catch\": function(tryLoc) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.tryLoc === tryLoc) {\n var record = entry.completion;\n if (record.type === \"throw\") {\n var thrown = record.arg;\n resetTryEntry(entry);\n }\n return thrown;\n }\n }\n\n // The context.catch method must only be called with a location\n // argument that corresponds to a known catch block.\n throw new Error(\"illegal catch attempt\");\n },\n\n delegateYield: function(iterable, resultName, nextLoc) {\n this.delegate = {\n iterator: values(iterable),\n resultName: resultName,\n nextLoc: nextLoc\n };\n\n if (this.method === \"next\") {\n // Deliberately forget the last sent value so that we don't\n // accidentally pass it on to the delegate.\n this.arg = undefined;\n }\n\n return ContinueSentinel;\n }\n };\n\n // Regardless of whether this script is executing as a CommonJS module\n // or not, return the runtime object so that we can declare the variable\n // regeneratorRuntime in the outer scope, which allows this module to be\n // injected easily by `bin/regenerator --include-runtime script.js`.\n return exports;\n\n}(\n // If this script is executing as a CommonJS module, use module.exports\n // as the regeneratorRuntime namespace. Otherwise create a new empty\n // object. Either way, the resulting object will be used to initialize\n // the regeneratorRuntime variable at the top of this file.\n typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n // This module should not be running in strict mode, so the above\n // assignment should always work unless something is misconfigured. Just\n // in case runtime.js accidentally runs in strict mode, we can escape\n // strict mode using a global Function call. This could conceivably fail\n // if a Content Security Policy forbids using Function, but in that case\n // the proper solution is to fix the accidental strict mode problem. If\n // you've misconfigured your bundler to force strict mode and applied a\n // CSP to forbid Function, and you're not willing to fix either of those\n // problems, please detail your unique predicament in a GitHub issue.\n Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","export default function _arrayLikeToArray(arr, len) {\n if (len == null || len > arr.length) len = arr.length;\n\n for (var i = 0, arr2 = new Array(len); i < len; i++) {\n arr2[i] = arr[i];\n }\n\n return arr2;\n}","import arrayLikeToArray from \"@babel/runtime/helpers/esm/arrayLikeToArray\";\nexport default function _unsupportedIterableToArray(o, minLen) {\n if (!o) return;\n if (typeof o === \"string\") return arrayLikeToArray(o, minLen);\n var n = Object.prototype.toString.call(o).slice(8, -1);\n if (n === \"Object\" && o.constructor) n = o.constructor.name;\n if (n === \"Map\" || n === \"Set\") return Array.from(o);\n if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return arrayLikeToArray(o, minLen);\n}","import arrayWithoutHoles from \"@babel/runtime/helpers/esm/arrayWithoutHoles\";\nimport iterableToArray from \"@babel/runtime/helpers/esm/iterableToArray\";\nimport unsupportedIterableToArray from \"@babel/runtime/helpers/esm/unsupportedIterableToArray\";\nimport nonIterableSpread from \"@babel/runtime/helpers/esm/nonIterableSpread\";\nexport default function _toConsumableArray(arr) {\n return arrayWithoutHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableSpread();\n}","import arrayLikeToArray from \"@babel/runtime/helpers/esm/arrayLikeToArray\";\nexport default function _arrayWithoutHoles(arr) {\n if (Array.isArray(arr)) return arrayLikeToArray(arr);\n}","export default function _iterableToArray(iter) {\n if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);\n}","export default function _nonIterableSpread() {\n throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","import unsupportedIterableToArray from \"@babel/runtime/helpers/esm/unsupportedIterableToArray\";\nexport default function _createForOfIteratorHelper(o, allowArrayLike) {\n var it;\n\n if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {\n if (Array.isArray(o) || (it = unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {\n if (it) o = it;\n var i = 0;\n\n var F = function F() {};\n\n return {\n s: F,\n n: function n() {\n if (i >= o.length) return {\n done: true\n };\n return {\n done: false,\n value: o[i++]\n };\n },\n e: function e(_e) {\n throw _e;\n },\n f: F\n };\n }\n\n throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n }\n\n var normalCompletion = true,\n didErr = false,\n err;\n return {\n s: function s() {\n it = o[Symbol.iterator]();\n },\n n: function n() {\n var step = it.next();\n normalCompletion = step.done;\n return step;\n },\n e: function e(_e2) {\n didErr = true;\n err = _e2;\n },\n f: function f() {\n try {\n if (!normalCompletion && it[\"return\"] != null) it[\"return\"]();\n } finally {\n if (didErr) throw err;\n }\n }\n };\n}","export default function _classCallCheck(instance, Constructor) {\n if (!(instance instanceof Constructor)) {\n throw new TypeError(\"Cannot call a class as a function\");\n }\n}","export default function _setPrototypeOf(o, p) {\n _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n o.__proto__ = p;\n return o;\n };\n\n return _setPrototypeOf(o, p);\n}","import setPrototypeOf from \"@babel/runtime/helpers/esm/setPrototypeOf\";\nexport default function _inherits(subClass, superClass) {\n if (typeof superClass !== \"function\" && superClass !== null) {\n throw new TypeError(\"Super expression must either be null or a function\");\n }\n\n subClass.prototype = Object.create(superClass && superClass.prototype, {\n constructor: {\n value: subClass,\n writable: true,\n configurable: true\n }\n });\n if (superClass) setPrototypeOf(subClass, superClass);\n}","export default function _getPrototypeOf(o) {\n _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n return o.__proto__ || Object.getPrototypeOf(o);\n };\n return _getPrototypeOf(o);\n}","export default function _isNativeReflectConstruct() {\n if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n if (Reflect.construct.sham) return false;\n if (typeof Proxy === \"function\") return true;\n\n try {\n Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n return true;\n } catch (e) {\n return false;\n }\n}","export default function _typeof(obj) {\n \"@babel/helpers - typeof\";\n\n if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n _typeof = function _typeof(obj) {\n return typeof obj;\n };\n } else {\n _typeof = function _typeof(obj) {\n return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n };\n }\n\n return _typeof(obj);\n}","import _typeof from \"@babel/runtime/helpers/esm/typeof\";\nimport assertThisInitialized from \"@babel/runtime/helpers/esm/assertThisInitialized\";\nexport default function _possibleConstructorReturn(self, call) {\n if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n return call;\n }\n\n return assertThisInitialized(self);\n}","export default function _assertThisInitialized(self) {\n if (self === void 0) {\n throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n }\n\n return self;\n}","import getPrototypeOf from \"@babel/runtime/helpers/esm/getPrototypeOf\";\nimport isNativeReflectConstruct from \"@babel/runtime/helpers/esm/isNativeReflectConstruct\";\nimport possibleConstructorReturn from \"@babel/runtime/helpers/esm/possibleConstructorReturn\";\nexport default function _createSuper(Derived) {\n var hasNativeReflectConstruct = isNativeReflectConstruct();\n return function _createSuperInternal() {\n var Super = getPrototypeOf(Derived),\n result;\n\n if (hasNativeReflectConstruct) {\n var NewTarget = getPrototypeOf(this).constructor;\n result = Reflect.construct(Super, arguments, NewTarget);\n } else {\n result = Super.apply(this, arguments);\n }\n\n return possibleConstructorReturn(this, result);\n };\n}","import setPrototypeOf from \"@babel/runtime/helpers/esm/setPrototypeOf\";\nimport isNativeReflectConstruct from \"@babel/runtime/helpers/esm/isNativeReflectConstruct\";\nexport default function _construct(Parent, args, Class) {\n if (isNativeReflectConstruct()) {\n _construct = Reflect.construct;\n } else {\n _construct = function _construct(Parent, args, Class) {\n var a = [null];\n a.push.apply(a, args);\n var Constructor = Function.bind.apply(Parent, a);\n var instance = new Constructor();\n if (Class) setPrototypeOf(instance, Class.prototype);\n return instance;\n };\n }\n\n return _construct.apply(null, arguments);\n}","import getPrototypeOf from \"@babel/runtime/helpers/esm/getPrototypeOf\";\nimport setPrototypeOf from \"@babel/runtime/helpers/esm/setPrototypeOf\";\nimport isNativeFunction from \"@babel/runtime/helpers/esm/isNativeFunction\";\nimport construct from \"@babel/runtime/helpers/esm/construct\";\nexport default function _wrapNativeSuper(Class) {\n var _cache = typeof Map === \"function\" ? new Map() : undefined;\n\n _wrapNativeSuper = function _wrapNativeSuper(Class) {\n if (Class === null || !isNativeFunction(Class)) return Class;\n\n if (typeof Class !== \"function\") {\n throw new TypeError(\"Super expression must either be null or a function\");\n }\n\n if (typeof _cache !== \"undefined\") {\n if (_cache.has(Class)) return _cache.get(Class);\n\n _cache.set(Class, Wrapper);\n }\n\n function Wrapper() {\n return construct(Class, arguments, getPrototypeOf(this).constructor);\n }\n\n Wrapper.prototype = Object.create(Class.prototype, {\n constructor: {\n value: Wrapper,\n enumerable: false,\n writable: true,\n configurable: true\n }\n });\n return setPrototypeOf(Wrapper, Class);\n };\n\n return _wrapNativeSuper(Class);\n}","export default function _isNativeFunction(fn) {\n return Function.toString.call(fn).indexOf(\"[native code]\") !== -1;\n}","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../../_version.js';\nexport const messages = {\n 'invalid-value': ({ paramName, validValueDescription, value }) => {\n if (!paramName || !validValueDescription) {\n throw new Error(`Unexpected input to 'invalid-value' error.`);\n }\n return `The '${paramName}' parameter was given a value with an ` +\n `unexpected value. ${validValueDescription} Received a value of ` +\n `${JSON.stringify(value)}.`;\n },\n 'not-an-array': ({ moduleName, className, funcName, paramName }) => {\n if (!moduleName || !className || !funcName || !paramName) {\n throw new Error(`Unexpected input to 'not-an-array' error.`);\n }\n return `The parameter '${paramName}' passed into ` +\n `'${moduleName}.${className}.${funcName}()' must be an array.`;\n },\n 'incorrect-type': ({ expectedType, paramName, moduleName, className, funcName }) => {\n if (!expectedType || !paramName || !moduleName || !funcName) {\n throw new Error(`Unexpected input to 'incorrect-type' error.`);\n }\n return `The parameter '${paramName}' passed into ` +\n `'${moduleName}.${className ? (className + '.') : ''}` +\n `${funcName}()' must be of type ${expectedType}.`;\n },\n 'incorrect-class': ({ expectedClass, paramName, moduleName, className, funcName, isReturnValueProblem }) => {\n if (!expectedClass || !moduleName || !funcName) {\n throw new Error(`Unexpected input to 'incorrect-class' error.`);\n }\n if (isReturnValueProblem) {\n return `The return value from ` +\n `'${moduleName}.${className ? (className + '.') : ''}${funcName}()' ` +\n `must be an instance of class ${expectedClass.name}.`;\n }\n return `The parameter '${paramName}' passed into ` +\n `'${moduleName}.${className ? (className + '.') : ''}${funcName}()' ` +\n `must be an instance of class ${expectedClass.name}.`;\n },\n 'missing-a-method': ({ expectedMethod, paramName, moduleName, className, funcName }) => {\n if (!expectedMethod || !paramName || !moduleName || !className\n || !funcName) {\n throw new Error(`Unexpected input to 'missing-a-method' error.`);\n }\n return `${moduleName}.${className}.${funcName}() expected the ` +\n `'${paramName}' parameter to expose a '${expectedMethod}' method.`;\n },\n 'add-to-cache-list-unexpected-type': ({ entry }) => {\n return `An unexpected entry was passed to ` +\n `'workbox-precaching.PrecacheController.addToCacheList()' The entry ` +\n `'${JSON.stringify(entry)}' isn't supported. You must supply an array of ` +\n `strings with one or more characters, objects with a url property or ` +\n `Request objects.`;\n },\n 'add-to-cache-list-conflicting-entries': ({ firstEntry, secondEntry }) => {\n if (!firstEntry || !secondEntry) {\n throw new Error(`Unexpected input to ` +\n `'add-to-cache-list-duplicate-entries' error.`);\n }\n return `Two of the entries passed to ` +\n `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` +\n `${firstEntry._entryId} but different revision details. Workbox is ` +\n `unable to cache and version the asset correctly. Please remove one ` +\n `of the entries.`;\n },\n 'plugin-error-request-will-fetch': ({ thrownError }) => {\n if (!thrownError) {\n throw new Error(`Unexpected input to ` +\n `'plugin-error-request-will-fetch', error.`);\n }\n return `An error was thrown by a plugins 'requestWillFetch()' method. ` +\n `The thrown error message was: '${thrownError.message}'.`;\n },\n 'invalid-cache-name': ({ cacheNameId, value }) => {\n if (!cacheNameId) {\n throw new Error(`Expected a 'cacheNameId' for error 'invalid-cache-name'`);\n }\n return `You must provide a name containing at least one character for ` +\n `setCacheDetails({${cacheNameId}: '...'}). Received a value of ` +\n `'${JSON.stringify(value)}'`;\n },\n 'unregister-route-but-not-found-with-method': ({ method }) => {\n if (!method) {\n throw new Error(`Unexpected input to ` +\n `'unregister-route-but-not-found-with-method' error.`);\n }\n return `The route you're trying to unregister was not previously ` +\n `registered for the method type '${method}'.`;\n },\n 'unregister-route-route-not-registered': () => {\n return `The route you're trying to unregister was not previously ` +\n `registered.`;\n },\n 'queue-replay-failed': ({ name }) => {\n return `Replaying the background sync queue '${name}' failed.`;\n },\n 'duplicate-queue-name': ({ name }) => {\n return `The Queue name '${name}' is already being used. ` +\n `All instances of backgroundSync.Queue must be given unique names.`;\n },\n 'expired-test-without-max-age': ({ methodName, paramName }) => {\n return `The '${methodName}()' method can only be used when the ` +\n `'${paramName}' is used in the constructor.`;\n },\n 'unsupported-route-type': ({ moduleName, className, funcName, paramName }) => {\n return `The supplied '${paramName}' parameter was an unsupported type. ` +\n `Please check the docs for ${moduleName}.${className}.${funcName} for ` +\n `valid input types.`;\n },\n 'not-array-of-class': ({ value, expectedClass, moduleName, className, funcName, paramName }) => {\n return `The supplied '${paramName}' parameter must be an array of ` +\n `'${expectedClass}' objects. Received '${JSON.stringify(value)},'. ` +\n `Please check the call to ${moduleName}.${className}.${funcName}() ` +\n `to fix the issue.`;\n },\n 'max-entries-or-age-required': ({ moduleName, className, funcName }) => {\n return `You must define either config.maxEntries or config.maxAgeSeconds` +\n `in ${moduleName}.${className}.${funcName}`;\n },\n 'statuses-or-headers-required': ({ moduleName, className, funcName }) => {\n return `You must define either config.statuses or config.headers` +\n `in ${moduleName}.${className}.${funcName}`;\n },\n 'invalid-string': ({ moduleName, funcName, paramName }) => {\n if (!paramName || !moduleName || !funcName) {\n throw new Error(`Unexpected input to 'invalid-string' error.`);\n }\n return `When using strings, the '${paramName}' parameter must start with ` +\n `'http' (for cross-origin matches) or '/' (for same-origin matches). ` +\n `Please see the docs for ${moduleName}.${funcName}() for ` +\n `more info.`;\n },\n 'channel-name-required': () => {\n return `You must provide a channelName to construct a ` +\n `BroadcastCacheUpdate instance.`;\n },\n 'invalid-responses-are-same-args': () => {\n return `The arguments passed into responsesAreSame() appear to be ` +\n `invalid. Please ensure valid Responses are used.`;\n },\n 'expire-custom-caches-only': () => {\n return `You must provide a 'cacheName' property when using the ` +\n `expiration plugin with a runtime caching strategy.`;\n },\n 'unit-must-be-bytes': ({ normalizedRangeHeader }) => {\n if (!normalizedRangeHeader) {\n throw new Error(`Unexpected input to 'unit-must-be-bytes' error.`);\n }\n return `The 'unit' portion of the Range header must be set to 'bytes'. ` +\n `The Range header provided was \"${normalizedRangeHeader}\"`;\n },\n 'single-range-only': ({ normalizedRangeHeader }) => {\n if (!normalizedRangeHeader) {\n throw new Error(`Unexpected input to 'single-range-only' error.`);\n }\n return `Multiple ranges are not supported. Please use a single start ` +\n `value, and optional end value. The Range header provided was ` +\n `\"${normalizedRangeHeader}\"`;\n },\n 'invalid-range-values': ({ normalizedRangeHeader }) => {\n if (!normalizedRangeHeader) {\n throw new Error(`Unexpected input to 'invalid-range-values' error.`);\n }\n return `The Range header is missing both start and end values. At least ` +\n `one of those values is needed. The Range header provided was ` +\n `\"${normalizedRangeHeader}\"`;\n },\n 'no-range-header': () => {\n return `No Range header was found in the Request provided.`;\n },\n 'range-not-satisfiable': ({ size, start, end }) => {\n return `The start (${start}) and end (${end}) values in the Range are ` +\n `not satisfiable by the cached response, which is ${size} bytes.`;\n },\n 'attempt-to-cache-non-get-request': ({ url, method }) => {\n return `Unable to cache '${url}' because it is a '${method}' request and ` +\n `only 'GET' requests can be cached.`;\n },\n 'cache-put-with-no-response': ({ url }) => {\n return `There was an attempt to cache '${url}' but the response was not ` +\n `defined.`;\n },\n 'no-response': ({ url, error }) => {\n let message = `The strategy could not generate a response for '${url}'.`;\n if (error) {\n message += ` The underlying error is ${error}.`;\n }\n return message;\n },\n 'bad-precaching-response': ({ url, status }) => {\n return `The precaching request for '${url}' failed with an HTTP ` +\n `status of ${status}.`;\n },\n 'non-precached-url': ({ url }) => {\n return `createHandlerBoundToURL('${url}') was called, but that URL is ` +\n `not precached. Please pass in a URL that is precached instead.`;\n },\n 'add-to-cache-list-conflicting-integrities': ({ url }) => {\n return `Two of the entries passed to ` +\n `'workbox-precaching.PrecacheController.addToCacheList()' had the URL ` +\n `${url} with different integrity values. Please remove one of them.`;\n },\n 'missing-precache-entry': ({ cacheName, url }) => {\n return `Unable to find a precached response in ${cacheName} for ${url}.`;\n },\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { messages } from './messages.js';\nimport '../../_version.js';\nconst fallback = (code, ...args) => {\n let msg = code;\n if (args.length > 0) {\n msg += ` :: ${JSON.stringify(args)}`;\n }\n return msg;\n};\nconst generatorFunction = (code, details = {}) => {\n const message = messages[code];\n if (!message) {\n throw new Error(`Unable to find message for code '${code}'.`);\n }\n return message(details);\n};\nexport const messageGenerator = (process.env.NODE_ENV === 'production') ?\n fallback : generatorFunction;\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { messageGenerator } from '../models/messages/messageGenerator.js';\nimport '../_version.js';\n/**\n * Workbox errors should be thrown with this class.\n * This allows use to ensure the type easily in tests,\n * helps developers identify errors from workbox\n * easily and allows use to optimise error\n * messages correctly.\n *\n * @private\n */\nclass WorkboxError extends Error {\n /**\n *\n * @param {string} errorCode The error code that\n * identifies this particular error.\n * @param {Object=} details Any relevant arguments\n * that will help developers identify issues should\n * be added as a key on the context object.\n */\n constructor(errorCode, details) {\n const message = messageGenerator(errorCode, details);\n super(message);\n this.name = errorCode;\n this.details = details;\n }\n}\nexport { WorkboxError };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n// Callbacks to be executed whenever there's a quota error.\nconst quotaErrorCallbacks = new Set();\nexport { quotaErrorCallbacks };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { logger } from './_private/logger.js';\nimport { assert } from './_private/assert.js';\nimport { quotaErrorCallbacks } from './models/quotaErrorCallbacks.js';\nimport './_version.js';\n/**\n * Adds a function to the set of quotaErrorCallbacks that will be executed if\n * there's a quota error.\n *\n * @param {Function} callback\n * @memberof module:workbox-core\n */\nfunction registerQuotaErrorCallback(callback) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(callback, 'function', {\n moduleName: 'workbox-core',\n funcName: 'register',\n paramName: 'callback',\n });\n }\n quotaErrorCallbacks.add(callback);\n if (process.env.NODE_ENV !== 'production') {\n logger.log('Registered a callback to respond to quota errors.', callback);\n }\n}\nexport { registerQuotaErrorCallback };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nconst _cacheNameDetails = {\n googleAnalytics: 'googleAnalytics',\n precache: 'precache-v2',\n prefix: 'workbox',\n runtime: 'runtime',\n suffix: typeof registration !== 'undefined' ? registration.scope : '',\n};\nconst _createCacheName = (cacheName) => {\n return [_cacheNameDetails.prefix, cacheName, _cacheNameDetails.suffix]\n .filter((value) => value && value.length > 0)\n .join('-');\n};\nconst eachCacheNameDetail = (fn) => {\n for (const key of Object.keys(_cacheNameDetails)) {\n fn(key);\n }\n};\nexport const cacheNames = {\n updateDetails: (details) => {\n eachCacheNameDetail((key) => {\n if (typeof details[key] === 'string') {\n _cacheNameDetails[key] = details[key];\n }\n });\n },\n getGoogleAnalyticsName: (userCacheName) => {\n return userCacheName || _createCacheName(_cacheNameDetails.googleAnalytics);\n },\n getPrecacheName: (userCacheName) => {\n return userCacheName || _createCacheName(_cacheNameDetails.precache);\n },\n getPrefix: () => {\n return _cacheNameDetails.prefix;\n },\n getRuntimeName: (userCacheName) => {\n return userCacheName || _createCacheName(_cacheNameDetails.runtime);\n },\n getSuffix: () => {\n return _cacheNameDetails.suffix;\n },\n};\n","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {\n try {\n var info = gen[key](arg);\n var value = info.value;\n } catch (error) {\n reject(error);\n return;\n }\n\n if (info.done) {\n resolve(value);\n } else {\n Promise.resolve(value).then(_next, _throw);\n }\n}\n\nexport default function _asyncToGenerator(fn) {\n return function () {\n var self = this,\n args = arguments;\n return new Promise(function (resolve, reject) {\n var gen = fn.apply(self, args);\n\n function _next(value) {\n asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);\n }\n\n function _throw(err) {\n asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);\n }\n\n _next(undefined);\n });\n };\n}","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { logger } from '../_private/logger.js';\nimport { quotaErrorCallbacks } from '../models/quotaErrorCallbacks.js';\nimport '../_version.js';\n/**\n * Runs all of the callback functions, one at a time sequentially, in the order\n * in which they were registered.\n *\n * @memberof module:workbox-core\n * @private\n */\nasync function executeQuotaErrorCallbacks() {\n if (process.env.NODE_ENV !== 'production') {\n logger.log(`About to run ${quotaErrorCallbacks.size} ` +\n `callbacks to clean up caches.`);\n }\n for (const callback of quotaErrorCallbacks) {\n await callback();\n if (process.env.NODE_ENV !== 'production') {\n logger.log(callback, 'is complete.');\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.log('Finished running callbacks.');\n }\n}\nexport { executeQuotaErrorCallbacks };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nconst getFriendlyURL = (url) => {\n const urlObj = new URL(String(url), location.href);\n // See https://github.com/GoogleChrome/workbox/issues/2323\n // We want to include everything, except for the origin if it's same-origin.\n return urlObj.href.replace(new RegExp(`^${location.origin}`), '');\n};\nexport { getFriendlyURL };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nlet supportStatus;\n/**\n * A utility function that determines whether the current browser supports\n * constructing a new `Response` from a `response.body` stream.\n *\n * @return {boolean} `true`, if the current browser can successfully\n * construct a `Response` from a `response.body` stream, `false` otherwise.\n *\n * @private\n */\nfunction canConstructResponseFromBodyStream() {\n if (supportStatus === undefined) {\n const testResponse = new Response('');\n if ('body' in testResponse) {\n try {\n new Response(testResponse.body);\n supportStatus = true;\n }\n catch (error) {\n supportStatus = false;\n }\n }\n supportStatus = false;\n }\n return supportStatus;\n}\nexport { canConstructResponseFromBodyStream };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nexport const pluginUtils = {\n filter: (plugins, callbackName) => {\n return plugins.filter((plugin) => callbackName in plugin);\n },\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from './assert.js';\nimport { executeQuotaErrorCallbacks } from './executeQuotaErrorCallbacks.js';\nimport { getFriendlyURL } from './getFriendlyURL.js';\nimport { logger } from './logger.js';\nimport { pluginUtils } from '../utils/pluginUtils.js';\nimport { WorkboxError } from './WorkboxError.js';\nimport '../_version.js';\n/**\n * Checks the list of plugins for the cacheKeyWillBeUsed callback, and\n * executes any of those callbacks found in sequence. The final `Request` object\n * returned by the last plugin is treated as the cache key for cache reads\n * and/or writes.\n *\n * @param {Object} options\n * @param {Request} options.request\n * @param {string} options.mode\n * @param {Array<Object>} [options.plugins=[]]\n * @return {Promise<Request>}\n *\n * @private\n * @memberof module:workbox-core\n */\nconst _getEffectiveRequest = async ({ request, mode, plugins = [], }) => {\n const cacheKeyWillBeUsedPlugins = pluginUtils.filter(plugins, \"cacheKeyWillBeUsed\" /* CACHE_KEY_WILL_BE_USED */);\n let effectiveRequest = request;\n for (const plugin of cacheKeyWillBeUsedPlugins) {\n effectiveRequest = await plugin[\"cacheKeyWillBeUsed\" /* CACHE_KEY_WILL_BE_USED */].call(plugin, { mode, request: effectiveRequest });\n if (typeof effectiveRequest === 'string') {\n effectiveRequest = new Request(effectiveRequest);\n }\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(effectiveRequest, Request, {\n moduleName: 'Plugin',\n funcName: \"cacheKeyWillBeUsed\" /* CACHE_KEY_WILL_BE_USED */,\n isReturnValueProblem: true,\n });\n }\n }\n return effectiveRequest;\n};\n/**\n * This method will call cacheWillUpdate on the available plugins (or use\n * status === 200) to determine if the Response is safe and valid to cache.\n *\n * @param {Object} options\n * @param {Request} options.request\n * @param {Response} options.response\n * @param {Event} [options.event]\n * @param {Array<Object>} [options.plugins=[]]\n * @return {Promise<Response>}\n *\n * @private\n * @memberof module:workbox-core\n */\nconst _isResponseSafeToCache = async ({ request, response, event, plugins = [], }) => {\n let responseToCache = response;\n let pluginsUsed = false;\n for (const plugin of plugins) {\n if (\"cacheWillUpdate\" /* CACHE_WILL_UPDATE */ in plugin) {\n pluginsUsed = true;\n const pluginMethod = plugin[\"cacheWillUpdate\" /* CACHE_WILL_UPDATE */];\n responseToCache = await pluginMethod.call(plugin, {\n request,\n response: responseToCache,\n event,\n });\n if (process.env.NODE_ENV !== 'production') {\n if (responseToCache) {\n assert.isInstance(responseToCache, Response, {\n moduleName: 'Plugin',\n funcName: \"cacheWillUpdate\" /* CACHE_WILL_UPDATE */,\n isReturnValueProblem: true,\n });\n }\n }\n if (!responseToCache) {\n break;\n }\n }\n }\n if (!pluginsUsed) {\n if (process.env.NODE_ENV !== 'production') {\n if (responseToCache) {\n if (responseToCache.status !== 200) {\n if (responseToCache.status === 0) {\n logger.warn(`The response for '${request.url}' is an opaque ` +\n `response. The caching strategy that you're using will not ` +\n `cache opaque responses by default.`);\n }\n else {\n logger.debug(`The response for '${request.url}' returned ` +\n `a status code of '${response.status}' and won't be cached as a ` +\n `result.`);\n }\n }\n }\n }\n responseToCache = responseToCache && responseToCache.status === 200 ?\n responseToCache : undefined;\n }\n return responseToCache ? responseToCache : null;\n};\n/**\n * This is a wrapper around cache.match().\n *\n * @param {Object} options\n * @param {string} options.cacheName Name of the cache to match against.\n * @param {Request} options.request The Request that will be used to look up\n * cache entries.\n * @param {Event} [options.event] The event that prompted the action.\n * @param {Object} [options.matchOptions] Options passed to cache.match().\n * @param {Array<Object>} [options.plugins=[]] Array of plugins.\n * @return {Response} A cached response if available.\n *\n * @private\n * @memberof module:workbox-core\n */\nconst matchWrapper = async ({ cacheName, request, event, matchOptions, plugins = [], }) => {\n const cache = await self.caches.open(cacheName);\n const effectiveRequest = await _getEffectiveRequest({\n plugins, request, mode: 'read'\n });\n let cachedResponse = await cache.match(effectiveRequest, matchOptions);\n if (process.env.NODE_ENV !== 'production') {\n if (cachedResponse) {\n logger.debug(`Found a cached response in '${cacheName}'.`);\n }\n else {\n logger.debug(`No cached response found in '${cacheName}'.`);\n }\n }\n for (const plugin of plugins) {\n if (\"cachedResponseWillBeUsed\" /* CACHED_RESPONSE_WILL_BE_USED */ in plugin) {\n const pluginMethod = plugin[\"cachedResponseWillBeUsed\" /* CACHED_RESPONSE_WILL_BE_USED */];\n cachedResponse = await pluginMethod.call(plugin, {\n cacheName,\n event,\n matchOptions,\n cachedResponse,\n request: effectiveRequest,\n });\n if (process.env.NODE_ENV !== 'production') {\n if (cachedResponse) {\n assert.isInstance(cachedResponse, Response, {\n moduleName: 'Plugin',\n funcName: \"cachedResponseWillBeUsed\" /* CACHED_RESPONSE_WILL_BE_USED */,\n isReturnValueProblem: true,\n });\n }\n }\n }\n }\n return cachedResponse;\n};\n/**\n * Wrapper around cache.put().\n *\n * Will call `cacheDidUpdate` on plugins if the cache was updated, using\n * `matchOptions` when determining what the old entry is.\n *\n * @param {Object} options\n * @param {string} options.cacheName\n * @param {Request} options.request\n * @param {Response} options.response\n * @param {Event} [options.event]\n * @param {Array<Object>} [options.plugins=[]]\n * @param {Object} [options.matchOptions]\n *\n * @private\n * @memberof module:workbox-core\n */\nconst putWrapper = async ({ cacheName, request, response, event, plugins = [], matchOptions, }) => {\n if (process.env.NODE_ENV !== 'production') {\n if (request.method && request.method !== 'GET') {\n throw new WorkboxError('attempt-to-cache-non-get-request', {\n url: getFriendlyURL(request.url),\n method: request.method,\n });\n }\n }\n const effectiveRequest = await _getEffectiveRequest({\n plugins, request, mode: 'write'\n });\n if (!response) {\n if (process.env.NODE_ENV !== 'production') {\n logger.error(`Cannot cache non-existent response for ` +\n `'${getFriendlyURL(effectiveRequest.url)}'.`);\n }\n throw new WorkboxError('cache-put-with-no-response', {\n url: getFriendlyURL(effectiveRequest.url),\n });\n }\n const responseToCache = await _isResponseSafeToCache({\n event,\n plugins,\n response,\n request: effectiveRequest,\n });\n if (!responseToCache) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Response '${getFriendlyURL(effectiveRequest.url)}' will ` +\n `not be cached.`, responseToCache);\n }\n return;\n }\n const cache = await self.caches.open(cacheName);\n const updatePlugins = pluginUtils.filter(plugins, \"cacheDidUpdate\" /* CACHE_DID_UPDATE */);\n const oldResponse = updatePlugins.length > 0 ?\n await matchWrapper({ cacheName, matchOptions, request: effectiveRequest }) :\n null;\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Updating the '${cacheName}' cache with a new Response for ` +\n `${getFriendlyURL(effectiveRequest.url)}.`);\n }\n try {\n await cache.put(effectiveRequest, responseToCache);\n }\n catch (error) {\n // See https://developer.mozilla.org/en-US/docs/Web/API/DOMException#exception-QuotaExceededError\n if (error.name === 'QuotaExceededError') {\n await executeQuotaErrorCallbacks();\n }\n throw error;\n }\n for (const plugin of updatePlugins) {\n await plugin[\"cacheDidUpdate\" /* CACHE_DID_UPDATE */].call(plugin, {\n cacheName,\n event,\n oldResponse,\n newResponse: responseToCache,\n request: effectiveRequest,\n });\n }\n};\nexport const cacheWrapper = {\n put: putWrapper,\n match: matchWrapper,\n};\n","/*\n Copyright 2019 Google LLC\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * A helper function that prevents a promise from being flagged as unused.\n *\n * @private\n **/\nexport function dontWaitFor(promise) {\n // Effective no-op.\n promise.then(() => { });\n}\n","import arrayWithHoles from \"@babel/runtime/helpers/esm/arrayWithHoles\";\nimport iterableToArrayLimit from \"@babel/runtime/helpers/esm/iterableToArrayLimit\";\nimport unsupportedIterableToArray from \"@babel/runtime/helpers/esm/unsupportedIterableToArray\";\nimport nonIterableRest from \"@babel/runtime/helpers/esm/nonIterableRest\";\nexport default function _slicedToArray(arr, i) {\n return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || unsupportedIterableToArray(arr, i) || nonIterableRest();\n}","export default function _arrayWithHoles(arr) {\n if (Array.isArray(arr)) return arr;\n}","export default function _iterableToArrayLimit(arr, i) {\n if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;\n var _arr = [];\n var _n = true;\n var _d = false;\n var _e = undefined;\n\n try {\n for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n _arr.push(_s.value);\n\n if (i && _arr.length === i) break;\n }\n } catch (err) {\n _d = true;\n _e = err;\n } finally {\n try {\n if (!_n && _i[\"return\"] != null) _i[\"return\"]();\n } finally {\n if (_d) throw _e;\n }\n }\n\n return _arr;\n}","export default function _nonIterableRest() {\n throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","function _defineProperties(target, props) {\n for (var i = 0; i < props.length; i++) {\n var descriptor = props[i];\n descriptor.enumerable = descriptor.enumerable || false;\n descriptor.configurable = true;\n if (\"value\" in descriptor) descriptor.writable = true;\n Object.defineProperty(target, descriptor.key, descriptor);\n }\n}\n\nexport default function _createClass(Constructor, protoProps, staticProps) {\n if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n if (staticProps) _defineProperties(Constructor, staticProps);\n return Constructor;\n}","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * A class that wraps common IndexedDB functionality in a promise-based API.\n * It exposes all the underlying power and functionality of IndexedDB, but\n * wraps the most commonly used features in a way that's much simpler to use.\n *\n * @private\n */\nexport class DBWrapper {\n /**\n * @param {string} name\n * @param {number} version\n * @param {Object=} [callback]\n * @param {!Function} [callbacks.onupgradeneeded]\n * @param {!Function} [callbacks.onversionchange] Defaults to\n * DBWrapper.prototype._onversionchange when not specified.\n * @private\n */\n constructor(name, version, { onupgradeneeded, onversionchange, } = {}) {\n this._db = null;\n this._name = name;\n this._version = version;\n this._onupgradeneeded = onupgradeneeded;\n this._onversionchange = onversionchange || (() => this.close());\n }\n /**\n * Returns the IDBDatabase instance (not normally needed).\n * @return {IDBDatabase|undefined}\n *\n * @private\n */\n get db() {\n return this._db;\n }\n /**\n * Opens a connected to an IDBDatabase, invokes any onupgradedneeded\n * callback, and added an onversionchange callback to the database.\n *\n * @return {IDBDatabase}\n * @private\n */\n async open() {\n if (this._db)\n return;\n this._db = await new Promise((resolve, reject) => {\n // This flag is flipped to true if the timeout callback runs prior\n // to the request failing or succeeding. Note: we use a timeout instead\n // of an onblocked handler since there are cases where onblocked will\n // never never run. A timeout better handles all possible scenarios:\n // https://github.com/w3c/IndexedDB/issues/223\n let openRequestTimedOut = false;\n setTimeout(() => {\n openRequestTimedOut = true;\n reject(new Error('The open request was blocked and timed out'));\n }, this.OPEN_TIMEOUT);\n const openRequest = indexedDB.open(this._name, this._version);\n openRequest.onerror = () => reject(openRequest.error);\n openRequest.onupgradeneeded = (evt) => {\n if (openRequestTimedOut) {\n openRequest.transaction.abort();\n openRequest.result.close();\n }\n else if (typeof this._onupgradeneeded === 'function') {\n this._onupgradeneeded(evt);\n }\n };\n openRequest.onsuccess = () => {\n const db = openRequest.result;\n if (openRequestTimedOut) {\n db.close();\n }\n else {\n db.onversionchange = this._onversionchange.bind(this);\n resolve(db);\n }\n };\n });\n return this;\n }\n /**\n * Polyfills the native `getKey()` method. Note, this is overridden at\n * runtime if the browser supports the native method.\n *\n * @param {string} storeName\n * @param {*} query\n * @return {Array}\n * @private\n */\n async getKey(storeName, query) {\n return (await this.getAllKeys(storeName, query, 1))[0];\n }\n /**\n * Polyfills the native `getAll()` method. Note, this is overridden at\n * runtime if the browser supports the native method.\n *\n * @param {string} storeName\n * @param {*} query\n * @param {number} count\n * @return {Array}\n * @private\n */\n async getAll(storeName, query, count) {\n return await this.getAllMatching(storeName, { query, count });\n }\n /**\n * Polyfills the native `getAllKeys()` method. Note, this is overridden at\n * runtime if the browser supports the native method.\n *\n * @param {string} storeName\n * @param {*} query\n * @param {number} count\n * @return {Array}\n * @private\n */\n async getAllKeys(storeName, query, count) {\n const entries = await this.getAllMatching(storeName, { query, count, includeKeys: true });\n return entries.map((entry) => entry.key);\n }\n /**\n * Supports flexible lookup in an object store by specifying an index,\n * query, direction, and count. This method returns an array of objects\n * with the signature .\n *\n * @param {string} storeName\n * @param {Object} [opts]\n * @param {string} [opts.index] The index to use (if specified).\n * @param {*} [opts.query]\n * @param {IDBCursorDirection} [opts.direction]\n * @param {number} [opts.count] The max number of results to return.\n * @param {boolean} [opts.includeKeys] When true, the structure of the\n * returned objects is changed from an array of values to an array of\n * objects in the form {key, primaryKey, value}.\n * @return {Array}\n * @private\n */\n async getAllMatching(storeName, { index, query = null, // IE/Edge errors if query === `undefined`.\n direction = 'next', count, includeKeys = false, } = {}) {\n return await this.transaction([storeName], 'readonly', (txn, done) => {\n const store = txn.objectStore(storeName);\n const target = index ? store.index(index) : store;\n const results = [];\n const request = target.openCursor(query, direction);\n request.onsuccess = () => {\n const cursor = request.result;\n if (cursor) {\n results.push(includeKeys ? cursor : cursor.value);\n if (count && results.length >= count) {\n done(results);\n }\n else {\n cursor.continue();\n }\n }\n else {\n done(results);\n }\n };\n });\n }\n /**\n * Accepts a list of stores, a transaction type, and a callback and\n * performs a transaction. A promise is returned that resolves to whatever\n * value the callback chooses. The callback holds all the transaction logic\n * and is invoked with two arguments:\n * 1. The IDBTransaction object\n * 2. A `done` function, that's used to resolve the promise when\n * when the transaction is done, if passed a value, the promise is\n * resolved to that value.\n *\n * @param {Array<string>} storeNames An array of object store names\n * involved in the transaction.\n * @param {string} type Can be `readonly` or `readwrite`.\n * @param {!Function} callback\n * @return {*} The result of the transaction ran by the callback.\n * @private\n */\n async transaction(storeNames, type, callback) {\n await this.open();\n return await new Promise((resolve, reject) => {\n const txn = this._db.transaction(storeNames, type);\n txn.onabort = () => reject(txn.error);\n txn.oncomplete = () => resolve();\n callback(txn, (value) => resolve(value));\n });\n }\n /**\n * Delegates async to a native IDBObjectStore method.\n *\n * @param {string} method The method name.\n * @param {string} storeName The object store name.\n * @param {string} type Can be `readonly` or `readwrite`.\n * @param {...*} args The list of args to pass to the native method.\n * @return {*} The result of the transaction.\n * @private\n */\n async _call(method, storeName, type, ...args) {\n const callback = (txn, done) => {\n const objStore = txn.objectStore(storeName);\n // TODO(philipwalton): Fix this underlying TS2684 error.\n // @ts-ignore\n const request = objStore[method].apply(objStore, args);\n request.onsuccess = () => done(request.result);\n };\n return await this.transaction([storeName], type, callback);\n }\n /**\n * Closes the connection opened by `DBWrapper.open()`. Generally this method\n * doesn't need to be called since:\n * 1. It's usually better to keep a connection open since opening\n * a new connection is somewhat slow.\n * 2. Connections are automatically closed when the reference is\n * garbage collected.\n * The primary use case for needing to close a connection is when another\n * reference (typically in another tab) needs to upgrade it and would be\n * blocked by the current, open connection.\n *\n * @private\n */\n close() {\n if (this._db) {\n this._db.close();\n this._db = null;\n }\n }\n}\n// Exposed on the prototype to let users modify the default timeout on a\n// per-instance or global basis.\nDBWrapper.prototype.OPEN_TIMEOUT = 2000;\n// Wrap native IDBObjectStore methods according to their mode.\nconst methodsToWrap = {\n readonly: ['get', 'count', 'getKey', 'getAll', 'getAllKeys'],\n readwrite: ['add', 'put', 'clear', 'delete'],\n};\nfor (const [mode, methods] of Object.entries(methodsToWrap)) {\n for (const method of methods) {\n if (method in IDBObjectStore.prototype) {\n // Don't use arrow functions here since we're outside of the class.\n DBWrapper.prototype[method] =\n async function (storeName, ...args) {\n return await this._call(method, storeName, mode, ...args);\n };\n }\n }\n}\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * Deletes the database.\n * Note: this is exported separately from the DBWrapper module because most\n * usages of IndexedDB in workbox dont need deleting, and this way it can be\n * reused in tests to delete databases without creating DBWrapper instances.\n *\n * @param {string} name The database name.\n * @private\n */\nexport const deleteDatabase = async (name) => {\n await new Promise((resolve, reject) => {\n const request = indexedDB.deleteDatabase(name);\n request.onerror = () => {\n reject(request.error);\n };\n request.onblocked = () => {\n reject(new Error('Delete blocked'));\n };\n request.onsuccess = () => {\n resolve();\n };\n });\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { WorkboxError } from './WorkboxError.js';\nimport { logger } from './logger.js';\nimport { assert } from './assert.js';\nimport { getFriendlyURL } from '../_private/getFriendlyURL.js';\nimport { pluginUtils } from '../utils/pluginUtils.js';\nimport '../_version.js';\n/**\n * Wrapper around the fetch API.\n *\n * Will call requestWillFetch on available plugins.\n *\n * @param {Object} options\n * @param {Request|string} options.request\n * @param {Object} [options.fetchOptions]\n * @param {ExtendableEvent} [options.event]\n * @param {Array<Object>} [options.plugins=[]]\n * @return {Promise<Response>}\n *\n * @private\n * @memberof module:workbox-core\n */\nconst wrappedFetch = async ({ request, fetchOptions, event, plugins = [], }) => {\n if (typeof request === 'string') {\n request = new Request(request);\n }\n // We *should* be able to call `await event.preloadResponse` even if it's\n // undefined, but for some reason, doing so leads to errors in our Node unit\n // tests. To work around that, explicitly check preloadResponse's value first.\n if (event instanceof FetchEvent && event.preloadResponse) {\n const possiblePreloadResponse = await event.preloadResponse;\n if (possiblePreloadResponse) {\n if (process.env.NODE_ENV !== 'production') {\n logger.log(`Using a preloaded navigation response for ` +\n `'${getFriendlyURL(request.url)}'`);\n }\n return possiblePreloadResponse;\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n paramName: 'request',\n expectedClass: Request,\n moduleName: 'workbox-core',\n className: 'fetchWrapper',\n funcName: 'wrappedFetch',\n });\n }\n const failedFetchPlugins = pluginUtils.filter(plugins, \"fetchDidFail\" /* FETCH_DID_FAIL */);\n // If there is a fetchDidFail plugin, we need to save a clone of the\n // original request before it's either modified by a requestWillFetch\n // plugin or before the original request's body is consumed via fetch().\n const originalRequest = failedFetchPlugins.length > 0 ?\n request.clone() : null;\n try {\n for (const plugin of plugins) {\n if (\"requestWillFetch\" /* REQUEST_WILL_FETCH */ in plugin) {\n const pluginMethod = plugin[\"requestWillFetch\" /* REQUEST_WILL_FETCH */];\n const requestClone = request.clone();\n request = await pluginMethod.call(plugin, {\n request: requestClone,\n event,\n });\n if (process.env.NODE_ENV !== 'production') {\n if (request) {\n assert.isInstance(request, Request, {\n moduleName: 'Plugin',\n funcName: \"cachedResponseWillBeUsed\" /* CACHED_RESPONSE_WILL_BE_USED */,\n isReturnValueProblem: true,\n });\n }\n }\n }\n }\n }\n catch (err) {\n throw new WorkboxError('plugin-error-request-will-fetch', {\n thrownError: err,\n });\n }\n // The request can be altered by plugins with `requestWillFetch` making\n // the original request (Most likely from a `fetch` event) to be different\n // to the Request we make. Pass both to `fetchDidFail` to aid debugging.\n const pluginFilteredRequest = request.clone();\n try {\n let fetchResponse;\n // See https://github.com/GoogleChrome/workbox/issues/1796\n if (request.mode === 'navigate') {\n fetchResponse = await fetch(request);\n }\n else {\n fetchResponse = await fetch(request, fetchOptions);\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Network request for ` +\n `'${getFriendlyURL(request.url)}' returned a response with ` +\n `status '${fetchResponse.status}'.`);\n }\n for (const plugin of plugins) {\n if (\"fetchDidSucceed\" /* FETCH_DID_SUCCEED */ in plugin) {\n fetchResponse = await plugin[\"fetchDidSucceed\" /* FETCH_DID_SUCCEED */]\n .call(plugin, {\n event,\n request: pluginFilteredRequest,\n response: fetchResponse,\n });\n if (process.env.NODE_ENV !== 'production') {\n if (fetchResponse) {\n assert.isInstance(fetchResponse, Response, {\n moduleName: 'Plugin',\n funcName: \"fetchDidSucceed\" /* FETCH_DID_SUCCEED */,\n isReturnValueProblem: true,\n });\n }\n }\n }\n }\n return fetchResponse;\n }\n catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n logger.error(`Network request for ` +\n `'${getFriendlyURL(request.url)}' threw an error.`, error);\n }\n for (const plugin of failedFetchPlugins) {\n await plugin[\"fetchDidFail\" /* FETCH_DID_FAIL */].call(plugin, {\n error,\n event,\n originalRequest: originalRequest.clone(),\n request: pluginFilteredRequest.clone(),\n });\n }\n throw error;\n }\n};\nconst fetchWrapper = {\n fetch: wrappedFetch,\n};\nexport { fetchWrapper };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { canConstructResponseFromBodyStream } from './_private/canConstructResponseFromBodyStream.js';\nimport './_version.js';\n/**\n * Allows developers to copy a response and modify its `headers`, `status`,\n * or `statusText` values (the values settable via a\n * [`ResponseInit`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Response/Response#Syntax}\n * object in the constructor).\n * To modify these values, pass a function as the second argument. That\n * function will be invoked with a single object with the response properties\n * `{headers, status, statusText}`. The return value of this function will\n * be used as the `ResponseInit` for the new `Response`. To change the values\n * either modify the passed parameter(s) and return it, or return a totally\n * new object.\n *\n * @param {Response} response\n * @param {Function} modifier\n * @memberof module:workbox-core\n */\nasync function copyResponse(response, modifier) {\n const clonedResponse = response.clone();\n // Create a fresh `ResponseInit` object by cloning the headers.\n const responseInit = {\n headers: new Headers(clonedResponse.headers),\n status: clonedResponse.status,\n statusText: clonedResponse.statusText,\n };\n // Apply any user modifications.\n const modifiedResponseInit = modifier ? modifier(responseInit) : responseInit;\n // Create the new response from the body stream and `ResponseInit`\n // modifications. Note: not all browsers support the Response.body stream,\n // so fall back to reading the entire body into memory as a blob.\n const body = canConstructResponseFromBodyStream() ?\n clonedResponse.body : await clonedResponse.blob();\n return new Response(body, modifiedResponseInit);\n}\nexport { copyResponse };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { DBWrapper } from 'workbox-core/_private/DBWrapper.js';\nimport { deleteDatabase } from 'workbox-core/_private/deleteDatabase.js';\nimport '../_version.js';\nconst DB_NAME = 'workbox-expiration';\nconst OBJECT_STORE_NAME = 'cache-entries';\nconst normalizeURL = (unNormalizedUrl) => {\n const url = new URL(unNormalizedUrl, location.href);\n url.hash = '';\n return url.href;\n};\n/**\n * Returns the timestamp model.\n *\n * @private\n */\nclass CacheTimestampsModel {\n /**\n *\n * @param {string} cacheName\n *\n * @private\n */\n constructor(cacheName) {\n this._cacheName = cacheName;\n this._db = new DBWrapper(DB_NAME, 1, {\n onupgradeneeded: (event) => this._handleUpgrade(event),\n });\n }\n /**\n * Should perform an upgrade of indexedDB.\n *\n * @param {Event} event\n *\n * @private\n */\n _handleUpgrade(event) {\n const db = event.target.result;\n // TODO(philipwalton): EdgeHTML doesn't support arrays as a keyPath, so we\n // have to use the `id` keyPath here and create our own values (a\n // concatenation of `url + cacheName`) instead of simply using\n // `keyPath: ['url', 'cacheName']`, which is supported in other browsers.\n const objStore = db.createObjectStore(OBJECT_STORE_NAME, { keyPath: 'id' });\n // TODO(philipwalton): once we don't have to support EdgeHTML, we can\n // create a single index with the keyPath `['cacheName', 'timestamp']`\n // instead of doing both these indexes.\n objStore.createIndex('cacheName', 'cacheName', { unique: false });\n objStore.createIndex('timestamp', 'timestamp', { unique: false });\n // Previous versions of `workbox-expiration` used `this._cacheName`\n // as the IDBDatabase name.\n deleteDatabase(this._cacheName);\n }\n /**\n * @param {string} url\n * @param {number} timestamp\n *\n * @private\n */\n async setTimestamp(url, timestamp) {\n url = normalizeURL(url);\n const entry = {\n url,\n timestamp,\n cacheName: this._cacheName,\n // Creating an ID from the URL and cache name won't be necessary once\n // Edge switches to Chromium and all browsers we support work with\n // array keyPaths.\n id: this._getId(url),\n };\n await this._db.put(OBJECT_STORE_NAME, entry);\n }\n /**\n * Returns the timestamp stored for a given URL.\n *\n * @param {string} url\n * @return {number}\n *\n * @private\n */\n async getTimestamp(url) {\n const entry = await this._db.get(OBJECT_STORE_NAME, this._getId(url));\n return entry.timestamp;\n }\n /**\n * Iterates through all the entries in the object store (from newest to\n * oldest) and removes entries once either `maxCount` is reached or the\n * entry's timestamp is less than `minTimestamp`.\n *\n * @param {number} minTimestamp\n * @param {number} maxCount\n * @return {Array<string>}\n *\n * @private\n */\n async expireEntries(minTimestamp, maxCount) {\n const entriesToDelete = await this._db.transaction(OBJECT_STORE_NAME, 'readwrite', (txn, done) => {\n const store = txn.objectStore(OBJECT_STORE_NAME);\n const request = store.index('timestamp').openCursor(null, 'prev');\n const entriesToDelete = [];\n let entriesNotDeletedCount = 0;\n request.onsuccess = () => {\n const cursor = request.result;\n if (cursor) {\n const result = cursor.value;\n // TODO(philipwalton): once we can use a multi-key index, we\n // won't have to check `cacheName` here.\n if (result.cacheName === this._cacheName) {\n // Delete an entry if it's older than the max age or\n // if we already have the max number allowed.\n if ((minTimestamp && result.timestamp < minTimestamp) ||\n (maxCount && entriesNotDeletedCount >= maxCount)) {\n // TODO(philipwalton): we should be able to delete the\n // entry right here, but doing so causes an iteration\n // bug in Safari stable (fixed in TP). Instead we can\n // store the keys of the entries to delete, and then\n // delete the separate transactions.\n // https://github.com/GoogleChrome/workbox/issues/1978\n // cursor.delete();\n // We only need to return the URL, not the whole entry.\n entriesToDelete.push(cursor.value);\n }\n else {\n entriesNotDeletedCount++;\n }\n }\n cursor.continue();\n }\n else {\n done(entriesToDelete);\n }\n };\n });\n // TODO(philipwalton): once the Safari bug in the following issue is fixed,\n // we should be able to remove this loop and do the entry deletion in the\n // cursor loop above:\n // https://github.com/GoogleChrome/workbox/issues/1978\n const urlsDeleted = [];\n for (const entry of entriesToDelete) {\n await this._db.delete(OBJECT_STORE_NAME, entry.id);\n urlsDeleted.push(entry.url);\n }\n return urlsDeleted;\n }\n /**\n * Takes a URL and returns an ID that will be unique in the object store.\n *\n * @param {string} url\n * @return {string}\n *\n * @private\n */\n _getId(url) {\n // Creating an ID from the URL and cache name won't be necessary once\n // Edge switches to Chromium and all browsers we support work with\n // array keyPaths.\n return this._cacheName + '|' + normalizeURL(url);\n }\n}\nexport { CacheTimestampsModel };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { dontWaitFor } from 'workbox-core/_private/dontWaitFor.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { CacheTimestampsModel } from './models/CacheTimestampsModel.js';\nimport './_version.js';\n/**\n * The `CacheExpiration` class allows you define an expiration and / or\n * limit on the number of responses stored in a\n * [`Cache`](https://developer.mozilla.org/en-US/docs/Web/API/Cache).\n *\n * @memberof module:workbox-expiration\n */\nclass CacheExpiration {\n /**\n * To construct a new CacheExpiration instance you must provide at least\n * one of the `config` properties.\n *\n * @param {string} cacheName Name of the cache to apply restrictions to.\n * @param {Object} config\n * @param {number} [config.maxEntries] The maximum number of entries to cache.\n * Entries used the least will be removed as the maximum is reached.\n * @param {number} [config.maxAgeSeconds] The maximum age of an entry before\n * it's treated as stale and removed.\n */\n constructor(cacheName, config = {}) {\n this._isRunning = false;\n this._rerunRequested = false;\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(cacheName, 'string', {\n moduleName: 'workbox-expiration',\n className: 'CacheExpiration',\n funcName: 'constructor',\n paramName: 'cacheName',\n });\n if (!(config.maxEntries || config.maxAgeSeconds)) {\n throw new WorkboxError('max-entries-or-age-required', {\n moduleName: 'workbox-expiration',\n className: 'CacheExpiration',\n funcName: 'constructor',\n });\n }\n if (config.maxEntries) {\n assert.isType(config.maxEntries, 'number', {\n moduleName: 'workbox-expiration',\n className: 'CacheExpiration',\n funcName: 'constructor',\n paramName: 'config.maxEntries',\n });\n // TODO: Assert is positive\n }\n if (config.maxAgeSeconds) {\n assert.isType(config.maxAgeSeconds, 'number', {\n moduleName: 'workbox-expiration',\n className: 'CacheExpiration',\n funcName: 'constructor',\n paramName: 'config.maxAgeSeconds',\n });\n // TODO: Assert is positive\n }\n }\n this._maxEntries = config.maxEntries;\n this._maxAgeSeconds = config.maxAgeSeconds;\n this._cacheName = cacheName;\n this._timestampModel = new CacheTimestampsModel(cacheName);\n }\n /**\n * Expires entries for the given cache and given criteria.\n */\n async expireEntries() {\n if (this._isRunning) {\n this._rerunRequested = true;\n return;\n }\n this._isRunning = true;\n const minTimestamp = this._maxAgeSeconds ?\n Date.now() - (this._maxAgeSeconds * 1000) : 0;\n const urlsExpired = await this._timestampModel.expireEntries(minTimestamp, this._maxEntries);\n // Delete URLs from the cache\n const cache = await self.caches.open(this._cacheName);\n for (const url of urlsExpired) {\n await cache.delete(url);\n }\n if (process.env.NODE_ENV !== 'production') {\n if (urlsExpired.length > 0) {\n logger.groupCollapsed(`Expired ${urlsExpired.length} ` +\n `${urlsExpired.length === 1 ? 'entry' : 'entries'} and removed ` +\n `${urlsExpired.length === 1 ? 'it' : 'them'} from the ` +\n `'${this._cacheName}' cache.`);\n logger.log(`Expired the following ${urlsExpired.length === 1 ?\n 'URL' : 'URLs'}:`);\n urlsExpired.forEach((url) => logger.log(` ${url}`));\n logger.groupEnd();\n }\n else {\n logger.debug(`Cache expiration ran and found no entries to remove.`);\n }\n }\n this._isRunning = false;\n if (this._rerunRequested) {\n this._rerunRequested = false;\n dontWaitFor(this.expireEntries());\n }\n }\n /**\n * Update the timestamp for the given URL. This ensures the when\n * removing entries based on maximum entries, most recently used\n * is accurate or when expiring, the timestamp is up-to-date.\n *\n * @param {string} url\n */\n async updateTimestamp(url) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(url, 'string', {\n moduleName: 'workbox-expiration',\n className: 'CacheExpiration',\n funcName: 'updateTimestamp',\n paramName: 'url',\n });\n }\n await this._timestampModel.setTimestamp(url, Date.now());\n }\n /**\n * Can be used to check if a URL has expired or not before it's used.\n *\n * This requires a look up from IndexedDB, so can be slow.\n *\n * Note: This method will not remove the cached entry, call\n * `expireEntries()` to remove indexedDB and Cache entries.\n *\n * @param {string} url\n * @return {boolean}\n */\n async isURLExpired(url) {\n if (!this._maxAgeSeconds) {\n if (process.env.NODE_ENV !== 'production') {\n throw new WorkboxError(`expired-test-without-max-age`, {\n methodName: 'isURLExpired',\n paramName: 'maxAgeSeconds',\n });\n }\n return false;\n }\n else {\n const timestamp = await this._timestampModel.getTimestamp(url);\n const expireOlderThan = Date.now() - (this._maxAgeSeconds * 1000);\n return (timestamp < expireOlderThan);\n }\n }\n /**\n * Removes the IndexedDB object store used to keep track of cache expiration\n * metadata.\n */\n async delete() {\n // Make sure we don't attempt another rerun if we're called in the middle of\n // a cache expiration.\n this._rerunRequested = false;\n await this._timestampModel.expireEntries(Infinity); // Expires all.\n }\n}\nexport { CacheExpiration };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { cacheNames } from 'workbox-core/_private/cacheNames.js';\nimport { dontWaitFor } from 'workbox-core/_private/dontWaitFor.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { registerQuotaErrorCallback } from 'workbox-core/registerQuotaErrorCallback.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { CacheExpiration } from './CacheExpiration.js';\nimport './_version.js';\n/**\n * This plugin can be used in the Workbox APIs to regularly enforce a\n * limit on the age and / or the number of cached requests.\n *\n * Whenever a cached request is used or updated, this plugin will look\n * at the used Cache and remove any old or extra requests.\n *\n * When using `maxAgeSeconds`, requests may be used *once* after expiring\n * because the expiration clean up will not have occurred until *after* the\n * cached request has been used. If the request has a \"Date\" header, then\n * a light weight expiration check is performed and the request will not be\n * used immediately.\n *\n * When using `maxEntries`, the entry least-recently requested will be removed\n * from the cache first.\n *\n * @memberof module:workbox-expiration\n */\nclass ExpirationPlugin {\n /**\n * @param {Object} config\n * @param {number} [config.maxEntries] The maximum number of entries to cache.\n * Entries used the least will be removed as the maximum is reached.\n * @param {number} [config.maxAgeSeconds] The maximum age of an entry before\n * it's treated as stale and removed.\n * @param {boolean} [config.purgeOnQuotaError] Whether to opt this cache in to\n * automatic deletion if the available storage quota has been exceeded.\n */\n constructor(config = {}) {\n /**\n * A \"lifecycle\" callback that will be triggered automatically by the\n * `workbox-strategies` handlers when a `Response` is about to be returned\n * from a [Cache](https://developer.mozilla.org/en-US/docs/Web/API/Cache) to\n * the handler. It allows the `Response` to be inspected for freshness and\n * prevents it from being used if the `Response`'s `Date` header value is\n * older than the configured `maxAgeSeconds`.\n *\n * @param {Object} options\n * @param {string} options.cacheName Name of the cache the response is in.\n * @param {Response} options.cachedResponse The `Response` object that's been\n * read from a cache and whose freshness should be checked.\n * @return {Response} Either the `cachedResponse`, if it's\n * fresh, or `null` if the `Response` is older than `maxAgeSeconds`.\n *\n * @private\n */\n this.cachedResponseWillBeUsed = async ({ event, request, cacheName, cachedResponse }) => {\n if (!cachedResponse) {\n return null;\n }\n const isFresh = this._isResponseDateFresh(cachedResponse);\n // Expire entries to ensure that even if the expiration date has\n // expired, it'll only be used once.\n const cacheExpiration = this._getCacheExpiration(cacheName);\n dontWaitFor(cacheExpiration.expireEntries());\n // Update the metadata for the request URL to the current timestamp,\n // but don't `await` it as we don't want to block the response.\n const updateTimestampDone = cacheExpiration.updateTimestamp(request.url);\n if (event) {\n try {\n event.waitUntil(updateTimestampDone);\n }\n catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n // The event may not be a fetch event; only log the URL if it is.\n if ('request' in event) {\n logger.warn(`Unable to ensure service worker stays alive when ` +\n `updating cache entry for ` +\n `'${getFriendlyURL(event.request.url)}'.`);\n }\n }\n }\n }\n return isFresh ? cachedResponse : null;\n };\n /**\n * A \"lifecycle\" callback that will be triggered automatically by the\n * `workbox-strategies` handlers when an entry is added to a cache.\n *\n * @param {Object} options\n * @param {string} options.cacheName Name of the cache that was updated.\n * @param {string} options.request The Request for the cached entry.\n *\n * @private\n */\n this.cacheDidUpdate = async ({ cacheName, request }) => {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(cacheName, 'string', {\n moduleName: 'workbox-expiration',\n className: 'Plugin',\n funcName: 'cacheDidUpdate',\n paramName: 'cacheName',\n });\n assert.isInstance(request, Request, {\n moduleName: 'workbox-expiration',\n className: 'Plugin',\n funcName: 'cacheDidUpdate',\n paramName: 'request',\n });\n }\n const cacheExpiration = this._getCacheExpiration(cacheName);\n await cacheExpiration.updateTimestamp(request.url);\n await cacheExpiration.expireEntries();\n };\n if (process.env.NODE_ENV !== 'production') {\n if (!(config.maxEntries || config.maxAgeSeconds)) {\n throw new WorkboxError('max-entries-or-age-required', {\n moduleName: 'workbox-expiration',\n className: 'Plugin',\n funcName: 'constructor',\n });\n }\n if (config.maxEntries) {\n assert.isType(config.maxEntries, 'number', {\n moduleName: 'workbox-expiration',\n className: 'Plugin',\n funcName: 'constructor',\n paramName: 'config.maxEntries',\n });\n }\n if (config.maxAgeSeconds) {\n assert.isType(config.maxAgeSeconds, 'number', {\n moduleName: 'workbox-expiration',\n className: 'Plugin',\n funcName: 'constructor',\n paramName: 'config.maxAgeSeconds',\n });\n }\n }\n this._config = config;\n this._maxAgeSeconds = config.maxAgeSeconds;\n this._cacheExpirations = new Map();\n if (config.purgeOnQuotaError) {\n registerQuotaErrorCallback(() => this.deleteCacheAndMetadata());\n }\n }\n /**\n * A simple helper method to return a CacheExpiration instance for a given\n * cache name.\n *\n * @param {string} cacheName\n * @return {CacheExpiration}\n *\n * @private\n */\n _getCacheExpiration(cacheName) {\n if (cacheName === cacheNames.getRuntimeName()) {\n throw new WorkboxError('expire-custom-caches-only');\n }\n let cacheExpiration = this._cacheExpirations.get(cacheName);\n if (!cacheExpiration) {\n cacheExpiration = new CacheExpiration(cacheName, this._config);\n this._cacheExpirations.set(cacheName, cacheExpiration);\n }\n return cacheExpiration;\n }\n /**\n * @param {Response} cachedResponse\n * @return {boolean}\n *\n * @private\n */\n _isResponseDateFresh(cachedResponse) {\n if (!this._maxAgeSeconds) {\n // We aren't expiring by age, so return true, it's fresh\n return true;\n }\n // Check if the 'date' header will suffice a quick expiration check.\n // See https://github.com/GoogleChromeLabs/sw-toolbox/issues/164 for\n // discussion.\n const dateHeaderTimestamp = this._getDateHeaderTimestamp(cachedResponse);\n if (dateHeaderTimestamp === null) {\n // Unable to parse date, so assume it's fresh.\n return true;\n }\n // If we have a valid headerTime, then our response is fresh iff the\n // headerTime plus maxAgeSeconds is greater than the current time.\n const now = Date.now();\n return dateHeaderTimestamp >= now - (this._maxAgeSeconds * 1000);\n }\n /**\n * This method will extract the data header and parse it into a useful\n * value.\n *\n * @param {Response} cachedResponse\n * @return {number|null}\n *\n * @private\n */\n _getDateHeaderTimestamp(cachedResponse) {\n if (!cachedResponse.headers.has('date')) {\n return null;\n }\n const dateHeader = cachedResponse.headers.get('date');\n const parsedDate = new Date(dateHeader);\n const headerTime = parsedDate.getTime();\n // If the Date header was invalid for some reason, parsedDate.getTime()\n // will return NaN.\n if (isNaN(headerTime)) {\n return null;\n }\n return headerTime;\n }\n /**\n * This is a helper method that performs two operations:\n *\n * - Deletes *all* the underlying Cache instances associated with this plugin\n * instance, by calling caches.delete() on your behalf.\n * - Deletes the metadata from IndexedDB used to keep track of expiration\n * details for each Cache instance.\n *\n * When using cache expiration, calling this method is preferable to calling\n * `caches.delete()` directly, since this will ensure that the IndexedDB\n * metadata is also cleanly removed and open IndexedDB instances are deleted.\n *\n * Note that if you're *not* using cache expiration for a given cache, calling\n * `caches.delete()` and passing in the cache's name should be sufficient.\n * There is no Workbox-specific method needed for cleanup in that case.\n */\n async deleteCacheAndMetadata() {\n // Do this one at a time instead of all at once via `Promise.all()` to\n // reduce the chance of inconsistency if a promise rejects.\n for (const [cacheName, cacheExpiration] of this._cacheExpirations) {\n await self.caches.delete(cacheName);\n await cacheExpiration.delete();\n }\n // Reset this._cacheExpirations to its initial state.\n this._cacheExpirations = new Map();\n }\n}\nexport { ExpirationPlugin };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nconst plugins = [];\nexport const precachePlugins = {\n /*\n * @return {Array}\n * @private\n */\n get() {\n return plugins;\n },\n /*\n * @param {Array} newPlugins\n * @private\n */\n add(newPlugins) {\n plugins.push(...newPlugins);\n },\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport '../_version.js';\n// Name of the search parameter used to store revision info.\nconst REVISION_SEARCH_PARAM = '__WB_REVISION__';\n/**\n * Converts a manifest entry into a versioned URL suitable for precaching.\n *\n * @param {Object|string} entry\n * @return {string} A URL with versioning info.\n *\n * @private\n * @memberof module:workbox-precaching\n */\nexport function createCacheKey(entry) {\n if (!entry) {\n throw new WorkboxError('add-to-cache-list-unexpected-type', { entry });\n }\n // If a precache manifest entry is a string, it's assumed to be a versioned\n // URL, like '/app.abcd1234.js'. Return as-is.\n if (typeof entry === 'string') {\n const urlObject = new URL(entry, location.href);\n return {\n cacheKey: urlObject.href,\n url: urlObject.href,\n };\n }\n const { revision, url } = entry;\n if (!url) {\n throw new WorkboxError('add-to-cache-list-unexpected-type', { entry });\n }\n // If there's just a URL and no revision, then it's also assumed to be a\n // versioned URL.\n if (!revision) {\n const urlObject = new URL(url, location.href);\n return {\n cacheKey: urlObject.href,\n url: urlObject.href,\n };\n }\n // Otherwise, construct a properly versioned URL using the custom Workbox\n // search parameter along with the revision info.\n const cacheKeyURL = new URL(url, location.href);\n const originalURL = new URL(url, location.href);\n cacheKeyURL.searchParams.set(REVISION_SEARCH_PARAM, revision);\n return {\n cacheKey: cacheKeyURL.href,\n url: originalURL.href,\n };\n}\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { PrecacheController } from '../PrecacheController.js';\nimport '../_version.js';\nlet precacheController;\n/**\n * @return {PrecacheController}\n * @private\n */\nexport const getOrCreatePrecacheController = () => {\n if (!precacheController) {\n precacheController = new PrecacheController();\n }\n return precacheController;\n};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { cacheNames } from 'workbox-core/_private/cacheNames.js';\nimport { cacheWrapper } from 'workbox-core/_private/cacheWrapper.js';\nimport { fetchWrapper } from 'workbox-core/_private/fetchWrapper.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { copyResponse } from 'workbox-core/copyResponse.js';\nimport { createCacheKey } from './utils/createCacheKey.js';\nimport { printCleanupDetails } from './utils/printCleanupDetails.js';\nimport { printInstallDetails } from './utils/printInstallDetails.js';\nimport './_version.js';\n/**\n * Performs efficient precaching of assets.\n *\n * @memberof module:workbox-precaching\n */\nclass PrecacheController {\n /**\n * Create a new PrecacheController.\n *\n * @param {string} [cacheName] An optional name for the cache, to override\n * the default precache name.\n */\n constructor(cacheName) {\n this._cacheName = cacheNames.getPrecacheName(cacheName);\n this._urlsToCacheKeys = new Map();\n this._urlsToCacheModes = new Map();\n this._cacheKeysToIntegrities = new Map();\n }\n /**\n * This method will add items to the precache list, removing duplicates\n * and ensuring the information is valid.\n *\n * @param {\n * Array<module:workbox-precaching.PrecacheController.PrecacheEntry|string>\n * } entries Array of entries to precache.\n */\n addToCacheList(entries) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isArray(entries, {\n moduleName: 'workbox-precaching',\n className: 'PrecacheController',\n funcName: 'addToCacheList',\n paramName: 'entries',\n });\n }\n const urlsToWarnAbout = [];\n for (const entry of entries) {\n // See https://github.com/GoogleChrome/workbox/issues/2259\n if (typeof entry === 'string') {\n urlsToWarnAbout.push(entry);\n }\n else if (entry && entry.revision === undefined) {\n urlsToWarnAbout.push(entry.url);\n }\n const { cacheKey, url } = createCacheKey(entry);\n const cacheMode = (typeof entry !== 'string' && entry.revision) ?\n 'reload' : 'default';\n if (this._urlsToCacheKeys.has(url) &&\n this._urlsToCacheKeys.get(url) !== cacheKey) {\n throw new WorkboxError('add-to-cache-list-conflicting-entries', {\n firstEntry: this._urlsToCacheKeys.get(url),\n secondEntry: cacheKey,\n });\n }\n if (typeof entry !== 'string' && entry.integrity) {\n if (this._cacheKeysToIntegrities.has(cacheKey) &&\n this._cacheKeysToIntegrities.get(cacheKey) !== entry.integrity) {\n throw new WorkboxError('add-to-cache-list-conflicting-integrities', {\n url,\n });\n }\n this._cacheKeysToIntegrities.set(cacheKey, entry.integrity);\n }\n this._urlsToCacheKeys.set(url, cacheKey);\n this._urlsToCacheModes.set(url, cacheMode);\n if (urlsToWarnAbout.length > 0) {\n const warningMessage = `Workbox is precaching URLs without revision ` +\n `info: ${urlsToWarnAbout.join(', ')}\\nThis is generally NOT safe. ` +\n `Learn more at https://bit.ly/wb-precache`;\n if (process.env.NODE_ENV === 'production') {\n // Use console directly to display this warning without bloating\n // bundle sizes by pulling in all of the logger codebase in prod.\n console.warn(warningMessage);\n }\n else {\n logger.warn(warningMessage);\n }\n }\n }\n }\n /**\n * Precaches new and updated assets. Call this method from the service worker\n * install event.\n *\n * @param {Object} options\n * @param {Event} [options.event] The install event (if needed).\n * @param {Array<Object>} [options.plugins] Plugins to be used for fetching\n * and caching during install.\n * @return {Promise<module:workbox-precaching.InstallResult>}\n */\n async install({ event, plugins } = {}) {\n if (process.env.NODE_ENV !== 'production') {\n if (plugins) {\n assert.isArray(plugins, {\n moduleName: 'workbox-precaching',\n className: 'PrecacheController',\n funcName: 'install',\n paramName: 'plugins',\n });\n }\n }\n const toBePrecached = [];\n const alreadyPrecached = [];\n const cache = await self.caches.open(this._cacheName);\n const alreadyCachedRequests = await cache.keys();\n const existingCacheKeys = new Set(alreadyCachedRequests.map((request) => request.url));\n for (const [url, cacheKey] of this._urlsToCacheKeys) {\n if (existingCacheKeys.has(cacheKey)) {\n alreadyPrecached.push(url);\n }\n else {\n toBePrecached.push({ cacheKey, url });\n }\n }\n const precacheRequests = toBePrecached.map(({ cacheKey, url }) => {\n const integrity = this._cacheKeysToIntegrities.get(cacheKey);\n const cacheMode = this._urlsToCacheModes.get(url);\n return this._addURLToCache({\n cacheKey,\n cacheMode,\n event,\n integrity,\n plugins,\n url,\n });\n });\n await Promise.all(precacheRequests);\n const updatedURLs = toBePrecached.map((item) => item.url);\n if (process.env.NODE_ENV !== 'production') {\n printInstallDetails(updatedURLs, alreadyPrecached);\n }\n return {\n updatedURLs,\n notUpdatedURLs: alreadyPrecached,\n };\n }\n /**\n * Deletes assets that are no longer present in the current precache manifest.\n * Call this method from the service worker activate event.\n *\n * @return {Promise<module:workbox-precaching.CleanupResult>}\n */\n async activate() {\n const cache = await self.caches.open(this._cacheName);\n const currentlyCachedRequests = await cache.keys();\n const expectedCacheKeys = new Set(this._urlsToCacheKeys.values());\n const deletedURLs = [];\n for (const request of currentlyCachedRequests) {\n if (!expectedCacheKeys.has(request.url)) {\n await cache.delete(request);\n deletedURLs.push(request.url);\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n printCleanupDetails(deletedURLs);\n }\n return { deletedURLs };\n }\n /**\n * Requests the entry and saves it to the cache if the response is valid.\n * By default, any response with a status code of less than 400 (including\n * opaque responses) is considered valid.\n *\n * If you need to use custom criteria to determine what's valid and what\n * isn't, then pass in an item in `options.plugins` that implements the\n * `cacheWillUpdate()` lifecycle event.\n *\n * @private\n * @param {Object} options\n * @param {string} options.cacheKey The string to use a cache key.\n * @param {string} options.url The URL to fetch and cache.\n * @param {string} [options.cacheMode] The cache mode for the network request.\n * @param {Event} [options.event] The install event (if passed).\n * @param {Array<Object>} [options.plugins] An array of plugins to apply to\n * fetch and caching.\n * @param {string} [options.integrity] The value to use for the `integrity`\n * field when making the request.\n */\n async _addURLToCache({ cacheKey, url, cacheMode, event, plugins, integrity }) {\n const request = new Request(url, {\n integrity,\n cache: cacheMode,\n credentials: 'same-origin',\n });\n let response = await fetchWrapper.fetch({\n event,\n plugins,\n request,\n });\n // Allow developers to override the default logic about what is and isn't\n // valid by passing in a plugin implementing cacheWillUpdate(), e.g.\n // a `CacheableResponsePlugin` instance.\n let cacheWillUpdatePlugin;\n for (const plugin of (plugins || [])) {\n if ('cacheWillUpdate' in plugin) {\n cacheWillUpdatePlugin = plugin;\n }\n }\n const isValidResponse = cacheWillUpdatePlugin ?\n // Use a callback if provided. It returns a truthy value if valid.\n // NOTE: invoke the method on the plugin instance so the `this` context\n // is correct.\n await cacheWillUpdatePlugin.cacheWillUpdate({ event, request, response }) :\n // Otherwise, default to considering any response status under 400 valid.\n // This includes, by default, considering opaque responses valid.\n response.status < 400;\n // Consider this a failure, leading to the `install` handler failing, if\n // we get back an invalid response.\n if (!isValidResponse) {\n throw new WorkboxError('bad-precaching-response', {\n url,\n status: response.status,\n });\n }\n // Redirected responses cannot be used to satisfy a navigation request, so\n // any redirected response must be \"copied\" rather than cloned, so the new\n // response doesn't contain the `redirected` flag. See:\n // https://bugs.chromium.org/p/chromium/issues/detail?id=669363&desc=2#c1\n if (response.redirected) {\n response = await copyResponse(response);\n }\n await cacheWrapper.put({\n event,\n plugins,\n response,\n // `request` already uses `url`. We may be able to reuse it.\n request: cacheKey === url ? request : new Request(cacheKey),\n cacheName: this._cacheName,\n matchOptions: {\n ignoreSearch: true,\n },\n });\n }\n /**\n * Returns a mapping of a precached URL to the corresponding cache key, taking\n * into account the revision information for the URL.\n *\n * @return {Map<string, string>} A URL to cache key mapping.\n */\n getURLsToCacheKeys() {\n return this._urlsToCacheKeys;\n }\n /**\n * Returns a list of all the URLs that have been precached by the current\n * service worker.\n *\n * @return {Array<string>} The precached URLs.\n */\n getCachedURLs() {\n return [...this._urlsToCacheKeys.keys()];\n }\n /**\n * Returns the cache key used for storing a given URL. If that URL is\n * unversioned, like `/index.html', then the cache key will be the original\n * URL with a search parameter appended to it.\n *\n * @param {string} url A URL whose cache key you want to look up.\n * @return {string} The versioned URL that corresponds to a cache key\n * for the original URL, or undefined if that URL isn't precached.\n */\n getCacheKeyForURL(url) {\n const urlObject = new URL(url, location.href);\n return this._urlsToCacheKeys.get(urlObject.href);\n }\n /**\n * This acts as a drop-in replacement for [`cache.match()`](https://developer.mozilla.org/en-US/docs/Web/API/Cache/match)\n * with the following differences:\n *\n * - It knows what the name of the precache is, and only checks in that cache.\n * - It allows you to pass in an \"original\" URL without versioning parameters,\n * and it will automatically look up the correct cache key for the currently\n * active revision of that URL.\n *\n * E.g., `matchPrecache('index.html')` will find the correct precached\n * response for the currently active service worker, even if the actual cache\n * key is `'/index.html?__WB_REVISION__=1234abcd'`.\n *\n * @param {string|Request} request The key (without revisioning parameters)\n * to look up in the precache.\n * @return {Promise<Response|undefined>}\n */\n async matchPrecache(request) {\n const url = request instanceof Request ? request.url : request;\n const cacheKey = this.getCacheKeyForURL(url);\n if (cacheKey) {\n const cache = await self.caches.open(this._cacheName);\n return cache.match(cacheKey);\n }\n return undefined;\n }\n /**\n * Returns a function that can be used within a\n * {@link module:workbox-routing.Route} that will find a response for the\n * incoming request against the precache.\n *\n * If for an unexpected reason there is a cache miss for the request,\n * this will fall back to retrieving the `Response` via `fetch()` when\n * `fallbackToNetwork` is `true`.\n *\n * @param {boolean} [fallbackToNetwork=true] Whether to attempt to get the\n * response from the network if there's a precache miss.\n * @return {module:workbox-routing~handlerCallback}\n */\n createHandler(fallbackToNetwork = true) {\n return async ({ request }) => {\n try {\n const response = await this.matchPrecache(request);\n if (response) {\n return response;\n }\n // This shouldn't normally happen, but there are edge cases:\n // https://github.com/GoogleChrome/workbox/issues/1441\n throw new WorkboxError('missing-precache-entry', {\n cacheName: this._cacheName,\n url: request instanceof Request ? request.url : request,\n });\n }\n catch (error) {\n if (fallbackToNetwork) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Unable to respond with precached response. ` +\n `Falling back to network.`, error);\n }\n return fetch(request);\n }\n throw error;\n }\n };\n }\n /**\n * Returns a function that looks up `url` in the precache (taking into\n * account revision information), and returns the corresponding `Response`.\n *\n * If for an unexpected reason there is a cache miss when looking up `url`,\n * this will fall back to retrieving the `Response` via `fetch()` when\n * `fallbackToNetwork` is `true`.\n *\n * @param {string} url The precached URL which will be used to lookup the\n * `Response`.\n * @param {boolean} [fallbackToNetwork=true] Whether to attempt to get the\n * response from the network if there's a precache miss.\n * @return {module:workbox-routing~handlerCallback}\n */\n createHandlerBoundToURL(url, fallbackToNetwork = true) {\n const cacheKey = this.getCacheKeyForURL(url);\n if (!cacheKey) {\n throw new WorkboxError('non-precached-url', { url });\n }\n const handler = this.createHandler(fallbackToNetwork);\n const request = new Request(url);\n return () => handler({ request });\n }\n}\nexport { PrecacheController };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * Removes any URL search parameters that should be ignored.\n *\n * @param {URL} urlObject The original URL.\n * @param {Array<RegExp>} ignoreURLParametersMatching RegExps to test against\n * each search parameter name. Matches mean that the search parameter should be\n * ignored.\n * @return {URL} The URL with any ignored search parameters removed.\n *\n * @private\n * @memberof module:workbox-precaching\n */\nexport function removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching = []) {\n // Convert the iterable into an array at the start of the loop to make sure\n // deletion doesn't mess up iteration.\n for (const paramName of [...urlObject.searchParams.keys()]) {\n if (ignoreURLParametersMatching.some((regExp) => regExp.test(paramName))) {\n urlObject.searchParams.delete(paramName);\n }\n }\n return urlObject;\n}\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { removeIgnoredSearchParams } from './removeIgnoredSearchParams.js';\nimport '../_version.js';\n/**\n * Generator function that yields possible variations on the original URL to\n * check, one at a time.\n *\n * @param {string} url\n * @param {Object} options\n *\n * @private\n * @memberof module:workbox-precaching\n */\nexport function* generateURLVariations(url, { ignoreURLParametersMatching, directoryIndex, cleanURLs, urlManipulation, } = {}) {\n const urlObject = new URL(url, location.href);\n urlObject.hash = '';\n yield urlObject.href;\n const urlWithoutIgnoredParams = removeIgnoredSearchParams(urlObject, ignoreURLParametersMatching);\n yield urlWithoutIgnoredParams.href;\n if (directoryIndex && urlWithoutIgnoredParams.pathname.endsWith('/')) {\n const directoryURL = new URL(urlWithoutIgnoredParams.href);\n directoryURL.pathname += directoryIndex;\n yield directoryURL.href;\n }\n if (cleanURLs) {\n const cleanURL = new URL(urlWithoutIgnoredParams.href);\n cleanURL.pathname += '.html';\n yield cleanURL.href;\n }\n if (urlManipulation) {\n const additionalURLs = urlManipulation({ url: urlObject });\n for (const urlToAttempt of additionalURLs) {\n yield urlToAttempt.href;\n }\n }\n}\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { getOrCreatePrecacheController } from './getOrCreatePrecacheController.js';\nimport { generateURLVariations } from './generateURLVariations.js';\nimport '../_version.js';\n/**\n * This function will take the request URL and manipulate it based on the\n * configuration options.\n *\n * @param {string} url\n * @param {Object} options\n * @return {string} Returns the URL in the cache that matches the request,\n * if possible.\n *\n * @private\n */\nexport const getCacheKeyForURL = (url, options) => {\n const precacheController = getOrCreatePrecacheController();\n const urlsToCacheKeys = precacheController.getURLsToCacheKeys();\n for (const possibleURL of generateURLVariations(url, options)) {\n const possibleCacheKey = urlsToCacheKeys.get(possibleURL);\n if (possibleCacheKey) {\n return possibleCacheKey;\n }\n }\n};\n","/*\n Copyright 2019 Google LLC\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { addFetchListener } from './utils/addFetchListener.js';\nimport './_version.js';\nlet listenerAdded = false;\n/**\n * Add a `fetch` listener to the service worker that will\n * respond to\n * [network requests]{@link https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers#Custom_responses_to_requests}\n * with precached assets.\n *\n * Requests for assets that aren't precached, the `FetchEvent` will not be\n * responded to, allowing the event to fall through to other `fetch` event\n * listeners.\n *\n * @param {Object} [options]\n * @param {string} [options.directoryIndex=index.html] The `directoryIndex` will\n * check cache entries for a URLs ending with '/' to see if there is a hit when\n * appending the `directoryIndex` value.\n * @param {Array<RegExp>} [options.ignoreURLParametersMatching=[/^utm_/]] An\n * array of regex's to remove search params when looking for a cache match.\n * @param {boolean} [options.cleanURLs=true] The `cleanURLs` option will\n * check the cache for the URL with a `.html` added to the end of the end.\n * @param {module:workbox-precaching~urlManipulation} [options.urlManipulation]\n * This is a function that should take a URL and return an array of\n * alternative URLs that should be checked for precache matches.\n *\n * @memberof module:workbox-precaching\n */\nfunction addRoute(options) {\n if (!listenerAdded) {\n addFetchListener(options);\n listenerAdded = true;\n }\n}\nexport { addRoute };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { cacheNames } from 'workbox-core/_private/cacheNames.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { getCacheKeyForURL } from './getCacheKeyForURL.js';\nimport '../_version.js';\n/**\n * Adds a `fetch` listener to the service worker that will\n * respond to\n * [network requests]{@link https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers#Custom_responses_to_requests}\n * with precached assets.\n *\n * Requests for assets that aren't precached, the `FetchEvent` will not be\n * responded to, allowing the event to fall through to other `fetch` event\n * listeners.\n *\n * NOTE: when called more than once this method will replace the previously set\n * configuration options. Calling it more than once is not recommended outside\n * of tests.\n *\n * @private\n * @param {Object} [options]\n * @param {string} [options.directoryIndex=index.html] The `directoryIndex` will\n * check cache entries for a URLs ending with '/' to see if there is a hit when\n * appending the `directoryIndex` value.\n * @param {Array<RegExp>} [options.ignoreURLParametersMatching=[/^utm_/]] An\n * array of regex's to remove search params when looking for a cache match.\n * @param {boolean} [options.cleanURLs=true] The `cleanURLs` option will\n * check the cache for the URL with a `.html` added to the end of the end.\n * @param {workbox.precaching~urlManipulation} [options.urlManipulation]\n * This is a function that should take a URL and return an array of\n * alternative URLs that should be checked for precache matches.\n */\nexport const addFetchListener = ({ ignoreURLParametersMatching = [/^utm_/], directoryIndex = 'index.html', cleanURLs = true, urlManipulation, } = {}) => {\n const cacheName = cacheNames.getPrecacheName();\n // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705\n self.addEventListener('fetch', ((event) => {\n const precachedURL = getCacheKeyForURL(event.request.url, {\n cleanURLs,\n directoryIndex,\n ignoreURLParametersMatching,\n urlManipulation,\n });\n if (!precachedURL) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Precaching did not find a match for ` +\n getFriendlyURL(event.request.url));\n }\n return;\n }\n let responsePromise = self.caches.open(cacheName).then((cache) => {\n return cache.match(precachedURL);\n }).then((cachedResponse) => {\n if (cachedResponse) {\n return cachedResponse;\n }\n // Fall back to the network if we don't have a cached response\n // (perhaps due to manual cache cleanup).\n if (process.env.NODE_ENV !== 'production') {\n logger.warn(`The precached response for ` +\n `${getFriendlyURL(precachedURL)} in ${cacheName} was not found. ` +\n `Falling back to the network instead.`);\n }\n return fetch(precachedURL);\n });\n if (process.env.NODE_ENV !== 'production') {\n responsePromise = responsePromise.then((response) => {\n // Workbox is going to handle the route.\n // print the routing details to the console.\n logger.groupCollapsed(`Precaching is responding to: ` +\n getFriendlyURL(event.request.url));\n logger.log(`Serving the precached url: ${precachedURL}`);\n logger.groupCollapsed(`View request details here.`);\n logger.log(event.request);\n logger.groupEnd();\n logger.groupCollapsed(`View response details here.`);\n logger.log(response);\n logger.groupEnd();\n logger.groupEnd();\n return response;\n });\n }\n event.respondWith(responsePromise);\n }));\n};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { getOrCreatePrecacheController } from './utils/getOrCreatePrecacheController.js';\nimport { precachePlugins } from './utils/precachePlugins.js';\nimport './_version.js';\nconst installListener = (event) => {\n const precacheController = getOrCreatePrecacheController();\n const plugins = precachePlugins.get();\n event.waitUntil(precacheController.install({ event, plugins })\n .catch((error) => {\n if (process.env.NODE_ENV !== 'production') {\n logger.error(`Service worker installation failed. It will ` +\n `be retried automatically during the next navigation.`);\n }\n // Re-throw the error to ensure installation fails.\n throw error;\n }));\n};\nconst activateListener = (event) => {\n const precacheController = getOrCreatePrecacheController();\n event.waitUntil(precacheController.activate());\n};\n/**\n * Adds items to the precache list, removing any duplicates and\n * stores the files in the\n * [\"precache cache\"]{@link module:workbox-core.cacheNames} when the service\n * worker installs.\n *\n * This method can be called multiple times.\n *\n * Please note: This method **will not** serve any of the cached files for you.\n * It only precaches files. To respond to a network request you call\n * [addRoute()]{@link module:workbox-precaching.addRoute}.\n *\n * If you have a single array of files to precache, you can just call\n * [precacheAndRoute()]{@link module:workbox-precaching.precacheAndRoute}.\n *\n * @param {Array<Object|string>} [entries=[]] Array of entries to precache.\n *\n * @memberof module:workbox-precaching\n */\nfunction precache(entries) {\n const precacheController = getOrCreatePrecacheController();\n precacheController.addToCacheList(entries);\n if (entries.length > 0) {\n // NOTE: these listeners will only be added once (even if the `precache()`\n // method is called multiple times) because event listeners are implemented\n // as a set, where each listener must be unique.\n // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705\n self.addEventListener('install', installListener);\n self.addEventListener('activate', activateListener);\n }\n}\nexport { precache };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { Router } from '../Router.js';\nimport '../_version.js';\nlet defaultRouter;\n/**\n * Creates a new, singleton Router instance if one does not exist. If one\n * does already exist, that instance is returned.\n *\n * @private\n * @return {Router}\n */\nexport const getOrCreateDefaultRouter = () => {\n if (!defaultRouter) {\n defaultRouter = new Router();\n // The helpers that use the default Router assume these listeners exist.\n defaultRouter.addFetchListener();\n defaultRouter.addCacheListener();\n }\n return defaultRouter;\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport '../_version.js';\n/**\n * @param {function()|Object} handler Either a function, or an object with a\n * 'handle' method.\n * @return {Object} An object with a handle method.\n *\n * @private\n */\nexport const normalizeHandler = (handler) => {\n if (handler && typeof handler === 'object') {\n if (process.env.NODE_ENV !== 'production') {\n assert.hasMethod(handler, 'handle', {\n moduleName: 'workbox-routing',\n className: 'Route',\n funcName: 'constructor',\n paramName: 'handler',\n });\n }\n return handler;\n }\n else {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(handler, 'function', {\n moduleName: 'workbox-routing',\n className: 'Route',\n funcName: 'constructor',\n paramName: 'handler',\n });\n }\n return { handle: handler };\n }\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { defaultMethod, validMethods } from './utils/constants.js';\nimport { normalizeHandler } from './utils/normalizeHandler.js';\nimport './_version.js';\n/**\n * A `Route` consists of a pair of callback functions, \"match\" and \"handler\".\n * The \"match\" callback determine if a route should be used to \"handle\" a\n * request by returning a non-falsy value if it can. The \"handler\" callback\n * is called when there is a match and should return a Promise that resolves\n * to a `Response`.\n *\n * @memberof module:workbox-routing\n */\nclass Route {\n /**\n * Constructor for Route class.\n *\n * @param {module:workbox-routing~matchCallback} match\n * A callback function that determines whether the route matches a given\n * `fetch` event by returning a non-falsy value.\n * @param {module:workbox-routing~handlerCallback} handler A callback\n * function that returns a Promise resolving to a Response.\n * @param {string} [method='GET'] The HTTP method to match the Route\n * against.\n */\n constructor(match, handler, method = defaultMethod) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(match, 'function', {\n moduleName: 'workbox-routing',\n className: 'Route',\n funcName: 'constructor',\n paramName: 'match',\n });\n if (method) {\n assert.isOneOf(method, validMethods, { paramName: 'method' });\n }\n }\n // These values are referenced directly by Router so cannot be\n // altered by minificaton.\n this.handler = normalizeHandler(handler);\n this.match = match;\n this.method = method;\n }\n}\nexport { Route };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * The default HTTP method, 'GET', used when there's no specific method\n * configured for a route.\n *\n * @type {string}\n *\n * @private\n */\nexport const defaultMethod = 'GET';\n/**\n * The list of valid HTTP methods associated with requests that could be routed.\n *\n * @type {Array<string>}\n *\n * @private\n */\nexport const validMethods = [\n 'DELETE',\n 'GET',\n 'HEAD',\n 'PATCH',\n 'POST',\n 'PUT',\n];\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { Route } from './Route.js';\nimport './_version.js';\n/**\n * RegExpRoute makes it easy to create a regular expression based\n * [Route]{@link module:workbox-routing.Route}.\n *\n * For same-origin requests the RegExp only needs to match part of the URL. For\n * requests against third-party servers, you must define a RegExp that matches\n * the start of the URL.\n *\n * [See the module docs for info.]{@link https://developers.google.com/web/tools/workbox/modules/workbox-routing}\n *\n * @memberof module:workbox-routing\n * @extends module:workbox-routing.Route\n */\nclass RegExpRoute extends Route {\n /**\n * If the regular expression contains\n * [capture groups]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#grouping-back-references},\n * the captured values will be passed to the\n * [handler's]{@link module:workbox-routing~handlerCallback} `params`\n * argument.\n *\n * @param {RegExp} regExp The regular expression to match against URLs.\n * @param {module:workbox-routing~handlerCallback} handler A callback\n * function that returns a Promise resulting in a Response.\n * @param {string} [method='GET'] The HTTP method to match the Route\n * against.\n */\n constructor(regExp, handler, method) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(regExp, RegExp, {\n moduleName: 'workbox-routing',\n className: 'RegExpRoute',\n funcName: 'constructor',\n paramName: 'pattern',\n });\n }\n const match = ({ url }) => {\n const result = regExp.exec(url.href);\n // Return immediately if there's no match.\n if (!result) {\n return;\n }\n // Require that the match start at the first character in the URL string\n // if it's a cross-origin request.\n // See https://github.com/GoogleChrome/workbox/issues/281 for the context\n // behind this behavior.\n if ((url.origin !== location.origin) && (result.index !== 0)) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`The regular expression '${regExp}' only partially matched ` +\n `against the cross-origin URL '${url}'. RegExpRoute's will only ` +\n `handle cross-origin requests if they match the entire URL.`);\n }\n return;\n }\n // If the route matches, but there aren't any capture groups defined, then\n // this will return [], which is truthy and therefore sufficient to\n // indicate a match.\n // If there are capture groups, then it will return their values.\n return result.slice(1);\n };\n super(match, handler, method);\n }\n}\nexport { RegExpRoute };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { normalizeHandler } from './utils/normalizeHandler.js';\nimport './_version.js';\n/**\n * The Router can be used to process a FetchEvent through one or more\n * [Routes]{@link module:workbox-routing.Route} responding with a Request if\n * a matching route exists.\n *\n * If no route matches a given a request, the Router will use a \"default\"\n * handler if one is defined.\n *\n * Should the matching Route throw an error, the Router will use a \"catch\"\n * handler if one is defined to gracefully deal with issues and respond with a\n * Request.\n *\n * If a request matches multiple routes, the **earliest** registered route will\n * be used to respond to the request.\n *\n * @memberof module:workbox-routing\n */\nclass Router {\n /**\n * Initializes a new Router.\n */\n constructor() {\n this._routes = new Map();\n }\n /**\n * @return {Map<string, Array<module:workbox-routing.Route>>} routes A `Map` of HTTP\n * method name ('GET', etc.) to an array of all the corresponding `Route`\n * instances that are registered.\n */\n get routes() {\n return this._routes;\n }\n /**\n * Adds a fetch event listener to respond to events when a route matches\n * the event's request.\n */\n addFetchListener() {\n // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705\n self.addEventListener('fetch', ((event) => {\n const { request } = event;\n const responsePromise = this.handleRequest({ request, event });\n if (responsePromise) {\n event.respondWith(responsePromise);\n }\n }));\n }\n /**\n * Adds a message event listener for URLs to cache from the window.\n * This is useful to cache resources loaded on the page prior to when the\n * service worker started controlling it.\n *\n * The format of the message data sent from the window should be as follows.\n * Where the `urlsToCache` array may consist of URL strings or an array of\n * URL string + `requestInit` object (the same as you'd pass to `fetch()`).\n *\n * ```\n * {\n * type: 'CACHE_URLS',\n * payload: {\n * urlsToCache: [\n * './script1.js',\n * './script2.js',\n * ['./script3.js', {mode: 'no-cors'}],\n * ],\n * },\n * }\n * ```\n */\n addCacheListener() {\n // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705\n self.addEventListener('message', ((event) => {\n if (event.data && event.data.type === 'CACHE_URLS') {\n const { payload } = event.data;\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Caching URLs from the window`, payload.urlsToCache);\n }\n const requestPromises = Promise.all(payload.urlsToCache.map((entry) => {\n if (typeof entry === 'string') {\n entry = [entry];\n }\n const request = new Request(...entry);\n return this.handleRequest({ request });\n // TODO(philipwalton): TypeScript errors without this typecast for\n // some reason (probably a bug). The real type here should work but\n // doesn't: `Array<Promise<Response> | undefined>`.\n })); // TypeScript\n event.waitUntil(requestPromises);\n // If a MessageChannel was used, reply to the message on success.\n if (event.ports && event.ports[0]) {\n requestPromises.then(() => event.ports[0].postMessage(true));\n }\n }\n }));\n }\n /**\n * Apply the routing rules to a FetchEvent object to get a Response from an\n * appropriate Route's handler.\n *\n * @param {Object} options\n * @param {Request} options.request The request to handle (this is usually\n * from a fetch event, but it does not have to be).\n * @param {FetchEvent} [options.event] The event that triggered the request,\n * if applicable.\n * @return {Promise<Response>|undefined} A promise is returned if a\n * registered route can handle the request. If there is no matching\n * route and there's no `defaultHandler`, `undefined` is returned.\n */\n handleRequest({ request, event }) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'handleRequest',\n paramName: 'options.request',\n });\n }\n const url = new URL(request.url, location.href);\n if (!url.protocol.startsWith('http')) {\n if (process.env.NODE_ENV !== 'production') {\n logger.debug(`Workbox Router only supports URLs that start with 'http'.`);\n }\n return;\n }\n const { params, route } = this.findMatchingRoute({ url, request, event });\n let handler = route && route.handler;\n const debugMessages = [];\n if (process.env.NODE_ENV !== 'production') {\n if (handler) {\n debugMessages.push([\n `Found a route to handle this request:`, route,\n ]);\n if (params) {\n debugMessages.push([\n `Passing the following params to the route's handler:`, params,\n ]);\n }\n }\n }\n // If we don't have a handler because there was no matching route, then\n // fall back to defaultHandler if that's defined.\n if (!handler && this._defaultHandler) {\n if (process.env.NODE_ENV !== 'production') {\n debugMessages.push(`Failed to find a matching route. Falling ` +\n `back to the default handler.`);\n }\n handler = this._defaultHandler;\n }\n if (!handler) {\n if (process.env.NODE_ENV !== 'production') {\n // No handler so Workbox will do nothing. If logs is set of debug\n // i.e. verbose, we should print out this information.\n logger.debug(`No route found for: ${getFriendlyURL(url)}`);\n }\n return;\n }\n if (process.env.NODE_ENV !== 'production') {\n // We have a handler, meaning Workbox is going to handle the route.\n // print the routing details to the console.\n logger.groupCollapsed(`Router is responding to: ${getFriendlyURL(url)}`);\n debugMessages.forEach((msg) => {\n if (Array.isArray(msg)) {\n logger.log(...msg);\n }\n else {\n logger.log(msg);\n }\n });\n logger.groupEnd();\n }\n // Wrap in try and catch in case the handle method throws a synchronous\n // error. It should still callback to the catch handler.\n let responsePromise;\n try {\n responsePromise = handler.handle({ url, request, event, params });\n }\n catch (err) {\n responsePromise = Promise.reject(err);\n }\n if (responsePromise instanceof Promise && this._catchHandler) {\n responsePromise = responsePromise.catch((err) => {\n if (process.env.NODE_ENV !== 'production') {\n // Still include URL here as it will be async from the console group\n // and may not make sense without the URL\n logger.groupCollapsed(`Error thrown when responding to: ` +\n ` ${getFriendlyURL(url)}. Falling back to Catch Handler.`);\n logger.error(`Error thrown by:`, route);\n logger.error(err);\n logger.groupEnd();\n }\n return this._catchHandler.handle({ url, request, event });\n });\n }\n return responsePromise;\n }\n /**\n * Checks a request and URL (and optionally an event) against the list of\n * registered routes, and if there's a match, returns the corresponding\n * route along with any params generated by the match.\n *\n * @param {Object} options\n * @param {URL} options.url\n * @param {Request} options.request The request to match.\n * @param {Event} [options.event] The corresponding event (unless N/A).\n * @return {Object} An object with `route` and `params` properties.\n * They are populated if a matching route was found or `undefined`\n * otherwise.\n */\n findMatchingRoute({ url, request, event }) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(url, URL, {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'findMatchingRoute',\n paramName: 'options.url',\n });\n assert.isInstance(request, Request, {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'findMatchingRoute',\n paramName: 'options.request',\n });\n }\n const routes = this._routes.get(request.method) || [];\n for (const route of routes) {\n let params;\n const matchResult = route.match({ url, request, event });\n if (matchResult) {\n // See https://github.com/GoogleChrome/workbox/issues/2079\n params = matchResult;\n if (Array.isArray(matchResult) && matchResult.length === 0) {\n // Instead of passing an empty array in as params, use undefined.\n params = undefined;\n }\n else if ((matchResult.constructor === Object &&\n Object.keys(matchResult).length === 0)) {\n // Instead of passing an empty object in as params, use undefined.\n params = undefined;\n }\n else if (typeof matchResult === 'boolean') {\n // For the boolean value true (rather than just something truth-y),\n // don't set params.\n // See https://github.com/GoogleChrome/workbox/pull/2134#issuecomment-513924353\n params = undefined;\n }\n // Return early if have a match.\n return { route, params };\n }\n }\n // If no match was found above, return and empty object.\n return {};\n }\n /**\n * Define a default `handler` that's called when no routes explicitly\n * match the incoming request.\n *\n * Without a default handler, unmatched requests will go against the\n * network as if there were no service worker present.\n *\n * @param {module:workbox-routing~handlerCallback} handler A callback\n * function that returns a Promise resulting in a Response.\n */\n setDefaultHandler(handler) {\n this._defaultHandler = normalizeHandler(handler);\n }\n /**\n * If a Route throws an error while handling a request, this `handler`\n * will be called and given a chance to provide a response.\n *\n * @param {module:workbox-routing~handlerCallback} handler A callback\n * function that returns a Promise resulting in a Response.\n */\n setCatchHandler(handler) {\n this._catchHandler = normalizeHandler(handler);\n }\n /**\n * Registers a route with the router.\n *\n * @param {module:workbox-routing.Route} route The route to register.\n */\n registerRoute(route) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isType(route, 'object', {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'registerRoute',\n paramName: 'route',\n });\n assert.hasMethod(route, 'match', {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'registerRoute',\n paramName: 'route',\n });\n assert.isType(route.handler, 'object', {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'registerRoute',\n paramName: 'route',\n });\n assert.hasMethod(route.handler, 'handle', {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'registerRoute',\n paramName: 'route.handler',\n });\n assert.isType(route.method, 'string', {\n moduleName: 'workbox-routing',\n className: 'Router',\n funcName: 'registerRoute',\n paramName: 'route.method',\n });\n }\n if (!this._routes.has(route.method)) {\n this._routes.set(route.method, []);\n }\n // Give precedence to all of the earlier routes by adding this additional\n // route to the end of the array.\n this._routes.get(route.method).push(route);\n }\n /**\n * Unregisters a route with the router.\n *\n * @param {module:workbox-routing.Route} route The route to unregister.\n */\n unregisterRoute(route) {\n if (!this._routes.has(route.method)) {\n throw new WorkboxError('unregister-route-but-not-found-with-method', {\n method: route.method,\n });\n }\n const routeIndex = this._routes.get(route.method).indexOf(route);\n if (routeIndex > -1) {\n this._routes.get(route.method).splice(routeIndex, 1);\n }\n else {\n throw new WorkboxError('unregister-route-route-not-registered');\n }\n }\n}\nexport { Router };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { Route } from './Route.js';\nimport { RegExpRoute } from './RegExpRoute.js';\nimport { getOrCreateDefaultRouter } from './utils/getOrCreateDefaultRouter.js';\nimport './_version.js';\n/**\n * Easily register a RegExp, string, or function with a caching\n * strategy to a singleton Router instance.\n *\n * This method will generate a Route for you if needed and\n * call [registerRoute()]{@link module:workbox-routing.Router#registerRoute}.\n *\n * @param {RegExp|string|module:workbox-routing.Route~matchCallback|module:workbox-routing.Route} capture\n * If the capture param is a `Route`, all other arguments will be ignored.\n * @param {module:workbox-routing~handlerCallback} [handler] A callback\n * function that returns a Promise resulting in a Response. This parameter\n * is required if `capture` is not a `Route` object.\n * @param {string} [method='GET'] The HTTP method to match the Route\n * against.\n * @return {module:workbox-routing.Route} The generated `Route`(Useful for\n * unregistering).\n *\n * @memberof module:workbox-routing\n */\nfunction registerRoute(capture, handler, method) {\n let route;\n if (typeof capture === 'string') {\n const captureUrl = new URL(capture, location.href);\n if (process.env.NODE_ENV !== 'production') {\n if (!(capture.startsWith('/') || capture.startsWith('http'))) {\n throw new WorkboxError('invalid-string', {\n moduleName: 'workbox-routing',\n funcName: 'registerRoute',\n paramName: 'capture',\n });\n }\n // We want to check if Express-style wildcards are in the pathname only.\n // TODO: Remove this log message in v4.\n const valueToCheck = capture.startsWith('http') ?\n captureUrl.pathname : capture;\n // See https://github.com/pillarjs/path-to-regexp#parameters\n const wildcards = '[*:?+]';\n if ((new RegExp(`${wildcards}`)).exec(valueToCheck)) {\n logger.debug(`The '$capture' parameter contains an Express-style wildcard ` +\n `character (${wildcards}). Strings are now always interpreted as ` +\n `exact matches; use a RegExp for partial or wildcard matches.`);\n }\n }\n const matchCallback = ({ url }) => {\n if (process.env.NODE_ENV !== 'production') {\n if ((url.pathname === captureUrl.pathname) &&\n (url.origin !== captureUrl.origin)) {\n logger.debug(`${capture} only partially matches the cross-origin URL ` +\n `${url}. This route will only handle cross-origin requests ` +\n `if they match the entire URL.`);\n }\n }\n return url.href === captureUrl.href;\n };\n // If `capture` is a string then `handler` and `method` must be present.\n route = new Route(matchCallback, handler, method);\n }\n else if (capture instanceof RegExp) {\n // If `capture` is a `RegExp` then `handler` and `method` must be present.\n route = new RegExpRoute(capture, handler, method);\n }\n else if (typeof capture === 'function') {\n // If `capture` is a function then `handler` and `method` must be present.\n route = new Route(capture, handler, method);\n }\n else if (capture instanceof Route) {\n route = capture;\n }\n else {\n throw new WorkboxError('unsupported-route-type', {\n moduleName: 'workbox-routing',\n funcName: 'registerRoute',\n paramName: 'capture',\n });\n }\n const defaultRouter = getOrCreateDefaultRouter();\n defaultRouter.registerRoute(route);\n return route;\n}\nexport { registerRoute };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { addRoute } from './addRoute.js';\nimport { precache } from './precache.js';\nimport './_version.js';\n/**\n * This method will add entries to the precache list and add a route to\n * respond to fetch events.\n *\n * This is a convenience method that will call\n * [precache()]{@link module:workbox-precaching.precache} and\n * [addRoute()]{@link module:workbox-precaching.addRoute} in a single call.\n *\n * @param {Array<Object|string>} entries Array of entries to precache.\n * @param {Object} [options] See\n * [addRoute() options]{@link module:workbox-precaching.addRoute}.\n *\n * @memberof module:workbox-precaching\n */\nfunction precacheAndRoute(entries, options) {\n precache(entries);\n addRoute(options);\n}\nexport { precacheAndRoute };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\nexport const cacheOkAndOpaquePlugin = {\n /**\n * Returns a valid response (to allow caching) if the status is 200 (OK) or\n * 0 (opaque).\n *\n * @param {Object} options\n * @param {Response} options.response\n * @return {Response|null}\n *\n * @private\n */\n cacheWillUpdate: async ({ response }) => {\n if (response.status === 200 || response.status === 0) {\n return response;\n }\n return null;\n },\n};\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { cacheNames } from 'workbox-core/_private/cacheNames.js';\nimport { cacheWrapper } from 'workbox-core/_private/cacheWrapper.js';\nimport { fetchWrapper } from 'workbox-core/_private/fetchWrapper.js';\nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport { messages } from './utils/messages.js';\nimport { cacheOkAndOpaquePlugin } from './plugins/cacheOkAndOpaquePlugin.js';\nimport './_version.js';\n/**\n * An implementation of a\n * [stale-while-revalidate]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#stale-while-revalidate}\n * request strategy.\n *\n * Resources are requested from both the cache and the network in parallel.\n * The strategy will respond with the cached version if available, otherwise\n * wait for the network response. The cache is updated with the network response\n * with each successful request.\n *\n * By default, this strategy will cache responses with a 200 status code as\n * well as [opaque responses]{@link https://developers.google.com/web/tools/workbox/guides/handle-third-party-requests}.\n * Opaque responses are cross-origin requests where the response doesn't\n * support [CORS]{@link https://enable-cors.org/}.\n *\n * If the network request fails, and there is no cache match, this will throw\n * a `WorkboxError` exception.\n *\n * @memberof module:workbox-strategies\n */\nclass StaleWhileRevalidate {\n /**\n * @param {Object} options\n * @param {string} options.cacheName Cache name to store and retrieve\n * requests. Defaults to cache names provided by\n * [workbox-core]{@link module:workbox-core.cacheNames}.\n * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}\n * to use in conjunction with this caching strategy.\n * @param {Object} options.fetchOptions Values passed along to the\n * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)\n * of all fetch() requests made by this strategy.\n * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)\n */\n constructor(options = {}) {\n this._cacheName = cacheNames.getRuntimeName(options.cacheName);\n this._plugins = options.plugins || [];\n if (options.plugins) {\n const isUsingCacheWillUpdate = options.plugins.some((plugin) => !!plugin.cacheWillUpdate);\n this._plugins = isUsingCacheWillUpdate ?\n options.plugins : [cacheOkAndOpaquePlugin, ...options.plugins];\n }\n else {\n // No plugins passed in, use the default plugin.\n this._plugins = [cacheOkAndOpaquePlugin];\n }\n this._fetchOptions = options.fetchOptions;\n this._matchOptions = options.matchOptions;\n }\n /**\n * This method will perform a request strategy and follows an API that\n * will work with the\n * [Workbox Router]{@link module:workbox-routing.Router}.\n *\n * @param {Object} options\n * @param {Request|string} options.request A request to run this strategy for.\n * @param {Event} [options.event] The event that triggered the request.\n * @return {Promise<Response>}\n */\n async handle({ event, request }) {\n const logs = [];\n if (typeof request === 'string') {\n request = new Request(request);\n }\n if (process.env.NODE_ENV !== 'production') {\n assert.isInstance(request, Request, {\n moduleName: 'workbox-strategies',\n className: 'StaleWhileRevalidate',\n funcName: 'handle',\n paramName: 'request',\n });\n }\n const fetchAndCachePromise = this._getFromNetwork({ request, event });\n let response = await cacheWrapper.match({\n cacheName: this._cacheName,\n request,\n event,\n matchOptions: this._matchOptions,\n plugins: this._plugins,\n });\n let error;\n if (response) {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`Found a cached response in the '${this._cacheName}'` +\n ` cache. Will update with the network response in the background.`);\n }\n if (event) {\n try {\n event.waitUntil(fetchAndCachePromise);\n }\n catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n logger.warn(`Unable to ensure service worker stays alive when ` +\n `updating cache for '${getFriendlyURL(request.url)}'.`);\n }\n }\n }\n }\n else {\n if (process.env.NODE_ENV !== 'production') {\n logs.push(`No response found in the '${this._cacheName}' cache. ` +\n `Will wait for the network response.`);\n }\n try {\n response = await fetchAndCachePromise;\n }\n catch (err) {\n error = err;\n }\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(messages.strategyStart('StaleWhileRevalidate', request));\n for (const log of logs) {\n logger.log(log);\n }\n messages.printFinalResponse(response);\n logger.groupEnd();\n }\n if (!response) {\n throw new WorkboxError('no-response', { url: request.url, error });\n }\n return response;\n }\n /**\n * @param {Object} options\n * @param {Request} options.request\n * @param {Event} [options.event]\n * @return {Promise<Response>}\n *\n * @private\n */\n async _getFromNetwork({ request, event }) {\n const response = await fetchWrapper.fetch({\n request,\n event,\n fetchOptions: this._fetchOptions,\n plugins: this._plugins,\n });\n const cachePutPromise = cacheWrapper.put({\n cacheName: this._cacheName,\n request,\n response: response.clone(),\n event,\n plugins: this._plugins,\n });\n if (event) {\n try {\n event.waitUntil(cachePutPromise);\n }\n catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n logger.warn(`Unable to ensure service worker stays alive when ` +\n `updating cache for '${getFriendlyURL(request.url)}'.`);\n }\n }\n }\n return response;\n }\n}\nexport { StaleWhileRevalidate };\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport './_version.js';\n/**\n * Claim any currently available clients once the service worker\n * becomes active. This is normally used in conjunction with `skipWaiting()`.\n *\n * @memberof module:workbox-core\n */\nfunction clientsClaim() {\n self.addEventListener('activate', () => self.clients.claim());\n}\nexport { clientsClaim };\n","/* eslint-disable no-restricted-globals */\n\n// This service worker can be customized!\n// See https://developers.google.com/web/tools/workbox/modules\n// for the list of available Workbox modules, or add any other\n// code you'd like.\n// You can also remove this file if you'd prefer not to use a\n// service worker, and the Workbox build step will be skipped.\n\nimport { clientsClaim } from 'workbox-core';\nimport { ExpirationPlugin } from 'workbox-expiration';\nimport { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching';\nimport { registerRoute } from 'workbox-routing';\nimport { StaleWhileRevalidate } from 'workbox-strategies';\n\nclientsClaim();\n\n// Precache all of the assets generated by your build process.\n// Their URLs are injected into the manifest variable below.\n// This variable must be present somewhere in your service worker file,\n// even if you decide not to use precaching. See https://cra.link/PWA\nprecacheAndRoute(self.__WB_MANIFEST);\n\n// Set up App Shell-style routing, so that all navigation requests\n// are fulfilled with your index.html shell. Learn more at\n// https://developers.google.com/web/fundamentals/architecture/app-shell\nconst fileExtensionRegexp = new RegExp('/[^/?]+\\\\.[^/]+$');\nregisterRoute(\n // Return false to exempt requests from being fulfilled by index.html.\n ({ request, url }) => {\n // If this isn't a navigation, skip.\n if (request.mode !== 'navigate') {\n return false;\n } // If this is a URL that starts with /_, skip.\n\n if (url.pathname.startsWith('/_')) {\n return false;\n } // If this looks like a URL for a resource, because it contains // a file extension, skip.\n\n if (url.pathname.match(fileExtensionRegexp)) {\n return false;\n } // Return true to signal that we want to use the handler.\n\n return true;\n },\n createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html')\n);\n\n// An example runtime caching route for requests that aren't handled by the\n// precache, in this case same-origin .png requests like those from in public/\nregisterRoute(\n // Add in any other file extensions or routing criteria as needed.\n ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'), // Customize this strategy as needed, e.g., by changing to CacheFirst.\n new StaleWhileRevalidate({\n cacheName: 'images',\n plugins: [\n // Ensure that once this runtime cache reaches a maximum size the\n // least-recently used images are removed.\n new ExpirationPlugin({ maxEntries: 50 }),\n ],\n })\n);\n\n// This allows the web app to trigger skipWaiting via\n// registration.waiting.postMessage({type: 'SKIP_WAITING'})\nself.addEventListener('message', (event) => {\n if (event.data && event.data.type === 'SKIP_WAITING') {\n self.skipWaiting();\n }\n});\n\n// Any other custom service worker logic can go here.\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { getOrCreatePrecacheController } from './utils/getOrCreatePrecacheController.js';\nimport './_version.js';\n/**\n * Helper function that calls\n * {@link PrecacheController#createHandlerBoundToURL} on the default\n * {@link PrecacheController} instance.\n *\n * If you are creating your own {@link PrecacheController}, then call the\n * {@link PrecacheController#createHandlerBoundToURL} on that instance,\n * instead of using this function.\n *\n * @param {string} url The precached URL which will be used to lookup the\n * `Response`.\n * @param {boolean} [fallbackToNetwork=true] Whether to attempt to get the\n * response from the network if there's a precache miss.\n * @return {module:workbox-routing~handlerCallback}\n *\n * @memberof module:workbox-precaching\n */\nfunction createHandlerBoundToURL(url) {\n const precacheController = getOrCreatePrecacheController();\n return precacheController.createHandlerBoundToURL(url);\n}\nexport { createHandlerBoundToURL };\n"]}