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golgi.js
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golgi.js
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/*
----------------------------------------------------------------------------
| Golgi: Dynamically-loading WebComponent Assembly Framework |
| |
| Copyright (c) 2023 MGateway Ltd, |
| Redhill, Surrey UK. |
| All rights reserved. |
| |
| https://www.mgateway.com |
| Email: [email protected] |
| |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
----------------------------------------------------------------------------
30 December 2023
*/
let count = 0;
let golgi = {
dataStore: {},
components: [],
componentsByName: {},
assemblies: new Map(),
stateMap: new Map(),
resourceLoaded: new Map(),
listeners: new Map(),
logging: false,
version: '1.5.1',
setLog: function (state) {
this.logging = state;
},
loadJSAsync: async function(src, attrs) {
return await golgi.loadJSFilePromise(src, attrs);
},
loadJSFilePromise: async function(src, attrs) {
let _this = this;
return new Promise((resolve) => {
_this.loadJS(src, attrs, function(src) {
resolve(src);
});
});
},
loadJS: function(src, attrs, callback) {
let crossorigin;
if (attrs) {
if (!callback && typeof attrs === 'function') {
callback = attrs;
}
else if (typeof attrs === 'object') {
crossorigin = attrs.crossorigin;
}
}
let script = document.createElement("script");
script.type = "text/javascript";
script.src = src
let _this = this;
script.onload = function(){
_this.logMessage('script ' + src + ' loaded');
if (callback) callback(src);
};
if (crossorigin) {
script.setAttribute('crossorigin', crossorigin);;
}
document.body.appendChild(script);
},
loadCSSAsync: async function(src, target) {
return await golgi.loadCSSPromise(src, target);
},
loadCSSPromise: async function(src, target) {
let _this = this;
return new Promise((resolve) => {
_this.loadCSS(src, target, function(src) {
resolve(src);
});
});
},
loadCSS: function(src, target, callback) {
let crossorigin;
if (target) {
if (!callback && typeof target === 'function') {
callback = target;
target = document.getElementsByTagName('head')[0];
}
else if (typeof target === 'object') {
crossorigin = target.crossorigin;
target = target.target;
if (!target) target = document.getElementsByTagName('head')[0];
}
}
if (!target) {
target = document.getElementsByTagName('head')[0];
}
let head = target;
let link = document.createElement("link");
link.rel = "stylesheet";
link.setAttribute('type', 'text/css');;
link.href = src;
if (crossorigin) {
link.setAttribute('crossorigin', crossorigin);;
}
let _this = this;
link.onload = function() {
_this.logMessage('CSS file ' + src + ' loaded');
if (callback) callback(src);
};
head.appendChild(link);
},
addMetaTag: function(attributes) {
let meta = document.createElement('meta');
let name;
for (name in attributes) {
meta.setAttribute(name, attributes[name]);
}
document.getElementsByTagName('head')[0].appendChild(meta);
},
fetch_optimised_components: async function(context, subset_file) {
let filename = subset_file || 'golgi-components.js';
// Fetch pre-built Server-side-generated version of all components for a namespace, ie single file minimised import
//let filename = context.componentPaths[namespace] + componentFile;
this.logMessage('fetching optimised file of all components: ' + filename);
const {golgi_components} = await import(filename);
let _this = this;
golgi_components.forEach(function(comp) {
if (!customElements.get(comp.n)) {
try {
comp.f();
_this.logMessage(comp.n + ' loaded');
}
catch(err) {
_this.logMessage('Unable to fetch optimised component module');
console.log(err);
}
}
});
},
fetch_optimised_assemblies: async function(context, subset_file) {
// Fetch pre-built Server-side-generated version of all assemblies, ie single file minimised import
let assemblyFile = subset_file || 'golgi-assemblies.js';
let filename = context.assemblyPath + assemblyFile;
this.logMessage('fetching optimised file of all assemblies: ' + filename);
let _this = this;
try {
const {golgi_assemblies} = await import(filename);
golgi_assemblies.forEach(function(obj) {
_this.assemblies.set(obj.n, obj.c);
});
}
catch(err) {
this.logMessage('Unable to fetch optimised assembly module');
}
this.emit('assembliesLoaded');
},
load: async function(componentName, targetElement, context) {
let namespace = componentName.split('-')[0];
this.logMessage('*** load ' + componentName);
let _this = this;
let jsPath = context.componentPath || './';
if (context.componentPaths && context.componentPaths[namespace]) {
jsPath = context.componentPaths[namespace];
}
let jsRootPath = jsPath;
if (jsRootPath.slice(-1) !== '/') {
jsRootPath = jsPath + '/';
}
function invokeComponent(elementClass) {
let element = new elementClass();
if (targetElement) {
targetElement.appendChild(element);
}
else {
golgi.components.push(element);
}
element.context = context;
element.path = jsPath;
element.rootPath = jsRootPath;
element.isComponent = true;
return element;
}
let elementClass = customElements.get(componentName);
if (elementClass) {
this.logMessage('** component ' + componentName + ' already imported');
let element = invokeComponent(elementClass);
return element;
}
else {
let _module = await import(jsPath + componentName + '.js');
if (!context.golgiLoadSequence) {
context.golgiLoadSequence = [];
}
context.golgiLoadSequence.push(componentName);
if (this.logging) {
this.logMessage('Component Load Sequence so far:');
console.log(context.golgiLoadSequence);
}
// check again in case loaded in the meantime by another async loop
let elementClass = customElements.get(componentName);
if (!elementClass) {
_module.load.call(this);
elementClass = customElements.get(componentName);
this.logMessage('** component ' + componentName + ' had to be imported');
}
else {
//if (log) console.log('** component ' + componentName + ' loaded by another loop');
}
let element = invokeComponent(elementClass);
return element;
}
},
loadGroup: async function(configArr, targetElement, context, refs) {
// The array of child components share the same target and must be appended
// in strict sequence, so this is enforced by this logic..
//targetElement = targetElement || 'body';
if (targetElement === 'body') targetElement = document.getElementsByTagName('body')[0];
context = context || {};
if (!Array.isArray(configArr)) {
configArr = [configArr];
}
//console.log('loadGroup - configArr:');
//console.log(configArr);
let assemblyName = configArr[0].assemblyName;
for (const config of configArr) {
await this.processComponent(config, assemblyName, targetElement, context, refs);
}
return;
},
processComponent: async function(component, assemblyName, targetElement, context, refs) {
//console.log('processComponent');
//console.log(component);
let targetEl = targetElement;
// optional target override
if (component.targetElement) {
let parent = this.getParentComponent.call(targetEl, component.targetElement.componentName);
//console.log('parent = ');
//console.log(parent);
if (parent && parent[component.targetElement.target]) {
targetEl = parent[component.targetElement.target];
}
}
// this is actually an assembly, so needs loading using
// renderAssembly instead
if (component.componentName.split(':')[0] === 'assembly') {
let aName = component.componentName.split('assembly:')[1];
//console.log('**** call renderAssembly for ' + aName);
await this.renderAssembly(aName, targetEl, context);
// invoke any hooks applied to the assembly
if (component.hook) {
try {
// note that the Golgi object will be the context for an assembly hook!
component.hook.call(this, context);
}
catch(err) {
if (this.logging) {
this.logMessage('Unable to execute hook ' + name + ' for ' + config.componentName);
console.log(err);
}
}
}
// assembly processing complete
return;
}
// load and render the component,
// then process its children if it has any
let element = await this.loadComponent(component, assemblyName, targetEl, context, refs);
if (component.children && component.children[0] && element.childrenTarget) {
component.children.forEach(function(c, index) {
component.children[index].assemblyName = assemblyName;
});
// load component's child components
await this.loadGroup(component.children, element.childrenTarget, context, refs);
}
return;
},
loadComponent: async function(component, assemblyName, targetElement, context, refs) {
let config = Object.assign({}, component);
//console.log('*** loadComponent:');
//console.log('config:');
//console.log(config)
//console.log('targetElement:');
//console.log(targetElement);
// is the component actually just a standard HTML tag?
if (!config.componentName.includes('-') && !config.componentName.includes(':')) {
//console.log('**** html tag: ****');
//console.log(config);
let element = document.createElement(config.componentName);
element.textContent = config.textContent;
for (let attr in config.attributes) {
if (attr === 'golgi:ref') {
refs[config.attributes[attr]] = element;
}
else {
element.setAttribute(attr, config.attributes[attr]);
}
}
element.childrenTarget = element;
if (targetElement) targetElement.appendChild(element);
// invoke any hooks applied to the assembly
if (config.hook) {
try {
let _this = {...this};
_this.element = element;
// note that the Golgi object will be the context for an HTML tag hook!
if (config.hook.constructor.name === 'AsyncFunction') {
await config.hook.call(_this, context);
}
else {
config.hook.call(_this, context);
}
}
catch(err) {
if (this.logging) {
this.logMessage('Unable to execute hook ' + name + ' for ' + config.componentName);
console.log(err);
}
}
}
return element;
}
// process the Golgi Component
// load any meta tag definitions into <head>
if (config.meta) {
config.meta.forEach(function(meta) {
golgi.addMetaTag(meta);
});
}
// load any script or css tags
// Use nested promises to await overall, but load in parallel
let tagArr = ['script', 'css'];
await Promise.all(tagArr.map(async (tagName) => {
if (tagName === 'script' && config.script) {
await Promise.all(config.script.map(async (script) => {
if (!golgi.resourceLoaded.has(script.src)) {
let obj;
if (script.crossorigin) {
obj = {crossorigin: script.crossorigin};
}
if (!script.await) {
golgi.loadJS(script.src, obj)
}
else {
await golgi.loadJSAsync(script.src, obj);
}
golgi.resourceLoaded.set(script.src, true);
}
}));
}
if (tagName === 'css' && config.css) {
await Promise.all(config.css.map(async (css) => {
if (!golgi.resourceLoaded.has(css.src)) {
let obj;
if (css.crossorigin) {
obj = {crossorigin: css.crossorigin};
}
if (!css.await) {
golgi.loadCSS(css.src, obj)
}
else {
await golgi.loadCSSAsync(css.src, obj);
}
golgi.resourceLoaded.set(css.src, true);
}
}));
}
}));
let element = await this.renderWebComponent(config, targetElement, context, refs);
if (element.parentComponent && element.parentComponent.onChildComponentReady) {
element.parentComponent.onChildComponentReady.call(element.parentComponent, element);
}
return element;
},
renderWebComponent: async function(config, targetElement, context, refs) {
let assemblyName = config.assemblyName;
let element = await this.load(config.componentName, targetElement, context);
if (refs && config.state && config.state['golgi:ref']) {
let name = config.state['golgi:ref'];
refs[name] = element;
delete config.state['golgi:ref'];
}
if (this.logging) {
//console.log('load element: ' + config.componentName);
//console.log(element);
//console.log(targetElement);
}
let targets;
if (element.shadowRoot) {
element.rootElement = element.shadowRoot.firstElementChild;
// don't want a style tag to be the root element (unless no other tags in component)
if (element.rootElement.tagName === 'STYLE') {
let ok = false;
let el = element.rootElement;
do {
if (el.nextSibling) {
el = el.nextSibling;
if (el.nodeType === 1) ok = true;
}
}
while (!ok)
if (ok) {
element.rootElement = el;
}
else {
// no other top-level element found in component, so revert to style tag
element.rootElement = element.shadowRoot.firstElementChild;
}
}
targets = element.shadowRoot.querySelectorAll('*');
}
else if (typeof element.html !== 'undefined') {
element.innerHTML = element.html;
element.rootElement = element.firstElementChild;
targets = element.querySelectorAll('*');
}
if (typeof element.rootElement !== 'undefined') {
element.databinding = [];
targets.forEach(function(el) {
if (el.hasAttribute('golgi:prop')) {
let prop = el.getAttribute('golgi:prop');
element[prop] = el;
el.removeAttribute('golgi:prop');
}
el.ownerComponent = element;
el.childNodes.forEach(function(child) {
if (child.nodeType === 3) {
let nodeValue = child.nodeValue.toString();
if (child.nodeValue.includes('golgi:bind')) {
let prop = child.nodeValue.split('golgi:bind=')[1] || 'dummy';
prop = prop.split(';')[0]; // may also other Golgi directives
let span = document.createElement('span');
el.insertBefore(span, child);
let fn = function(dataObj) {
let value = dataObj;
if (typeof dataObj === 'object') value = dataObj[prop];
if (typeof value !== 'undefined') span.innerHTML = value;
};
element.databinding.push(fn);
child.nodeValue = '';
}
if (nodeValue.includes('golgi:observer')) {
let target = el;
if (el.firstChild && el.firstChild.tagName === 'SPAN') {
target = el.firstChild;
}
let method = nodeValue.split('golgi:observer=')[1];
method = method.split(';')[0]; // may also other Golgi directives
let observer = golgi.observeText(target, element, method, el);
observer.observe(target, {
childList: true,
subtree: true
});
}
}
});
[...el.attributes].forEach(function(attr) {
if (attr.name.startsWith('golgi:on_')) {
let eventName = attr.name.split('golgi:on_')[1];
let funcName = attr.value
if (element[funcName] && typeof element[funcName] === 'function') {
let fn;
if (element[funcName].constructor.name === 'AsyncFunction') {
fn = async function(evt) {
await element[funcName](evt);
};
}
else {
fn = function(evt) {
element[funcName](evt);
};
}
golgi.addHandler.call(element, fn, el, eventName);
}
el.removeAttribute(attr.name);
}
if (attr.value.includes('golgi:bind')) {
let prop = attr.value.split('golgi:bind=')[1];
prop = prop.split(';')[0]; // if there are other golgi directives in the attribute value
let fn;
if ((el.tagName === 'INPUT' || el.tagName === 'TEXTAREA') && attr.name === 'value') {
fn = function(dataObj) {
let value = dataObj;
if (typeof dataObj === 'object') value = dataObj[prop];
if (typeof value !== 'undefined') el.value = value;
};
}
else {
fn = function(dataObj) {
let value = dataObj;
if (typeof dataObj === 'object') value = dataObj[prop];
if (typeof value !== 'undefined') el.setAttribute(attr.name, value);
};
}
element.databinding.push(fn);
el.removeAttribute(attr.name);
}
if (attr.value.includes('golgi:observer')) {
let methodName = attr.value.split('golgi:observer=')[1];
methodName = methodName.split(';')[0]; // if there are other golgi directives in the attribute value
let observer = golgi.observeAttr(attr.name, methodName);
observer.observe(el, {
attributeFilter: [attr.name],
attributeOldValue: true,
});
}
});
});
if (!element.childrenTarget) {
element.childrenTarget = element.rootElement;
}
element.childrenTarget.ownerComponent = element;
let attrName = 'golgi:component-class';
let parentClass = element.rootElement.getAttribute(attrName);
if (parentClass) {
let classes = parentClass.split(' ');
classes.forEach(function(cls) {
element.classList.add(cls);
});
element.rootElement.removeAttribute(attrName);
}
}
element.componentName = config.componentName;
element.getParentComponent = this.getParentComponent.bind(element);
element.onUnload = this.onUnload.bind(element);
element.registerUnloadMethod = this.registerUnloadMethod.bind(element);
element.remove = this.remove.bind(element);
element.removeAllByName = this.removeAllByName;
element.getComponentByName = this.getComponentByName.bind(this);
element.getComponentsByName = this.getComponentsByName;
element.addHandler = this.addHandler.bind(element);
element.addMetaTag = this.addMetaTag;
element.loadResources = this.loadResources;
element.loadJSAsync = this.loadJSAsync
element.loadJS = this.loadJS.bind(this);
element.loadCSSAsync = this.loadCSSAsync;
element.loadCSS = this.loadCSS.bind(this);
element.logging = this.logging;
element.logMessage = this.logMessage.bind(this);
element.loadGroup = this.loadGroup.bind(this);
element.renderAssembly = this.renderAssembly.bind(this);
element.renderComponent = this.renderComponent.bind(this);
element.renderComponentMap = this.renderComponentMap.bind(this);
element.observerStart = this.observerStart;
element.methodsToRemove = [];
element.golgi_state = this.golgi_state;
element.addStateMap = this.addStateMap.bind(element);
element.applyDataBinding = this.applyDataBinding.bind(element);
element.registeredListenerTypes = new Map();
element.on = this.el_on.bind(element);
element.off = this.el_off.bind(element);
element.emit = this.el_emit.bind(element);
element.onAssemblyRendered = function(name, callback) {
golgi.on(name + '_rendered', callback, element);
};
element.ownerAssembly = assemblyName;
element.onOwnerAssemblyRendered = function(callback) {
golgi.on(assemblyName + '_rendered', callback, element);
};
if (!context.rootComponent) {
context.rootComponent = element;
}
element.rootComponent = context.rootComponent;
if (targetElement) element.parentComponent = targetElement.ownerComponent;
if (!golgi.componentsByName[element.tagName]) golgi.componentsByName[element.tagName] = [];
golgi.componentsByName[element.tagName].push(element);
if (this.logging) {
this.logMessage('Golgi Component instantiated and ready for use:');
console.log(element);
}
if (element.onBeforeState) {
if (element.onBeforeState.constructor.name === 'AsyncFunction') {
await element.onBeforeState();
}
else {
element.onBeforeState();
}
}
if (config.state) {
for (let sname in config.state) {
if (element[sname] && typeof element[sname] === 'function') {
element[sname].call(element, config.state[sname]);
delete config.state[sname];
}
}
if (config.state && element.setState && typeof element.setState === 'function') {
element.setState(config.state);
}
}
if (config.stateMap) {
config.state_map = new Map();
for (let key in config.stateMap) {
config.state_map.set(key, config.stateMap[key]);
}
}
if (config.state_map) {
config.state_map.forEach(function(method, path) {
if (!golgi.stateMap.has(path)) {
golgi.stateMap.set(path, []);
}
golgi.stateMap.get(path).push({
component: element,
method: method
});
});
}
if (element.onBeforeHooks) {
element.onBeforeHooks();
}
// invoke hook if present
if (config.hook) {
try {
if (config.hook.constructor.name === 'AsyncFunction') {
await config.hook.call(element, context);
}
else {
config.hook.call(element, context);
}
}
catch(err) {
if (this.logging) {
this.logMessage('Unable to execute hook ' + name + ' for ' + config.componentName);
console.log(err);
}
}
}
if (element.onAfterHooks) {
element.onAfterHooks();
}
element.emit('componentReady');
return element;
},
renderComponentMap: async function(componentName, targetElement, context, controlArray, stateMapDef, callback) {
let ix = -1;
let pieces = stateMapDef.split(':');
let arrayName = pieces[0];
let methodName = pieces[1];
if (typeof methodName === 'undefined' || methodName === '') {
methodName = 'applyDataBinding';
}
for (let value of controlArray) {
let comp = await this.renderComponent(componentName, targetElement, context);
if (callback) {
callback.call(comp, comp, value);
}
ix++;
let path = arrayName + '.' + ix;
comp.addStateMap(path, methodName);
}
this.golgi_state[arrayName] = controlArray;
},
renderAssembly: async function(args, targetElement, context) {
let name;
let refs = {};
if (!targetElement && !context && typeof args === 'object') {
targetElement = args.targetElement;
context = args.context;
name = args.name;
}
else {
name = args;
}
if (!context) return;
if (!name) return;
if (name === '') return;
let path = context.assemblyPath;
if (path === '') path = './';
if (path.slice(-1) !== '/') {
path = path + '/';
}
let _module;
if (this.assemblies.has(name)) {
_module = {load: this.assemblies.get(name)};
}
else {
_module = await import(path + name + '.js');
}
let assemblyObj = _module.load.call(this, context);
let json = assemblyObj.gjson || {};
if (assemblyObj.gx) {
json = this.parse(assemblyObj.gx, assemblyObj.hooks, context);
}
if (json) {
if (!Array.isArray(json)) {
json = [json];
}
let rootFound = false;
json.forEach(function(component, index) {
json[index].assemblyName = name;
if (component.state && component.state['golgi:ref'] === 'root') rootFound = true;
});
if (!rootFound) {
if (!json[0].state) json[0].state = {};
json[0].state['golgi:ref']='root';
}
}
await this.loadGroup(json, targetElement, context, refs);
this.emit(name + '_rendered');
let rootElement = refs['root'];
for (let name in refs) {
if (name !== 'root') {
rootElement[name] = refs[name];
}
}
rootElement.refs = refs;
return rootElement;
},
async renderComponent(componentName, targetElement, context) {
if (targetElement === 'body') {
targetElement = document.getElementsByTagName('body')[0];
}
let noOfInstances = 0;
if (targetElement) noOfInstances = targetElement.getElementsByTagName(componentName).length;
let assembly = [{
componentName: componentName
}];
await this.loadGroup(assembly, targetElement, context);
if (!targetElement) return golgi.components;
return targetElement.getElementsByTagName(componentName)[noOfInstances];
},
getParentComponent(options) {
options = options || {};
if (typeof options === 'string') {
options = {match: options};
}
if (this.element) {
this.tagName = this.element.tagName;
this.parentNode = this.element.parentNode;
}
let prefix = options.prefix || this.tagName.split('-')[0];
function findParent(node) {
if (node.nodeType === 11) {
// #shadowRoot node
node = node.host;
}
else {
node = node.parentNode;
}
if (!node) return null;
if (options.match) {
if (node.tagName === options.match.toUpperCase()) return node;
}
else {
if (node.tagName.startsWith(prefix)) return node;
}
return findParent(node);
}
return findParent(this);
},
getComponentsByName(name) {
return golgi.componentsByName[name.toUpperCase()] || [];
},
getComponentByName(componentName, name, parentNode) {
//let customComponentElement = this.getCustomComponentElement(componentName, name);
//if (customComponentElement) return customComponentElement;
parentNode = parentNode || document;
let node = [...parentNode.getElementsByTagName(componentName.toUpperCase())];
if (!name) return node;
let i;
for (i = 0; i < node.length; i++) {
if (node[i].name === name) {
return node[i];
}
}
return;
},
addHandler: function(fn, targetElement, type) {
if (!type && typeof targetElement === 'string') {
type = targetElement;
targetElement = null;
}
type = type || 'click';
targetElement = targetElement || this.rootElement;
targetElement.addEventListener(type, fn);
if (!this.listeners) this.listeners = [];
this.listeners.push({
type: type,
fn: fn,
target: targetElement
});
},
registerUnloadMethod(fn) {
this.methodsToRemove.push(fn);
},
onUnload: function() {
if (this.logging) {
this.logMessage('removing Golgi COmponent:');
console.log(this);
}
for (const type of this.registeredListenerTypes.keys()) {
this.logMessage('removing customHandler for type ' + type);
this.off(type);
}
let _this = this;
if (this.listeners) {
this.listeners.forEach(function(listener) {
if (_this.logging) {
_this.logMessage('removing listener');
console.log(listener);
}
listener.target.removeEventListener(listener.type, listener.fn);
});
}
this.methodsToRemove.forEach(function(method) {
if (_this.logging) {
_this.logMessage('invoking custom unload method');
console.log(method);
}
method();
});
},
remove: function() {
// remove component and all its sub-components
// to ensure their disconnectedCallbacks fire
function getChildren(node) {
let children = [...node.childNodes];
children.forEach(function(child) {
if (child.nodeType === 1) {
// drop into shadowRoot if necessary to ensure full recursion
if (child.shadowRoot) {
child = child.shadowRoot;
}
getChildren(child);
if (child.isComponent) {
child.onUnload();
child.parentNode.removeChild(child);
}
}
});
}
getChildren(this);
this.onUnload();
for (let index in golgi.componentsByName[this.tagName]) {
let comp = golgi.componentsByName[this.tagName][index];
if (comp.name === this.name) {
golgi.componentsByName[this.tagName].splice(index, 1);
break;
}
}
this.parentNode.removeChild(this);
},
removeAllByName: function(componentName, parentElement) {
let comps;
if (parentElement) {
comps = [...parentElement.getElementsByTagName(componentName)];
}
else {
comps = [...document.getElementsByTagName(componentName)];
}
if (comps) {
comps.forEach((component) => {
component.remove();
});
}
},
el_on: function(type, callback) {
if (!this.registeredListenerTypes.has(type)) {
let handler = function(e) {
callback(e.detail);
};
this.addEventListener(type, handler);
this.registeredListenerTypes.set(type, handler);
}
},
el_emit: function(type, data) {
if (this.registeredListenerTypes.has(type)) {
let evt = new CustomEvent(type, {
detail: data
});
this.dispatchEvent(evt);
}
},
el_off: function(type) {
if (this.registeredListenerTypes.has(type)) {
let handler = this.registeredListenerTypes.get(type);
this.removeEventListener(type, handler);
this.registeredListenerTypes.delete(type);
}