pkg: add type lints.

lib/lru.js

@@ -13,6 +13,9 @@ const assert = require('bsert');
  */
 
 class LRU {
+  /** @type {Map} */
+  map;
+
   /**
    * Create an LRU cache.
    * @constructor
@@ -27,6 +30,7 @@ class LRU {
     assert(!getSize || typeof getSize === 'function', 'Bad size callback.');
     assert(!CustomMap || typeof CustomMap === 'function');
 
+    // @ts-ignore
     this.map = CustomMap ? new CustomMap() : new Map();
     this.size = 0;
     this.items = 0;
@@ -202,20 +206,10 @@ class LRU {
     return true;
   }
 
-  /**
-   * Prepend an item to the linked list (sets new head).
-   * @private
-   * @param {LRUItem}
-   */
-
-  _prependList(item) {
-    this._insertList(null, item);
-  }
-
   /**
    * Append an item to the linked list (sets new tail).
    * @private
-   * @param {LRUItem}
+   * @param {LRUItem} item
    */
 
   _appendList(item) {
@@ -259,7 +253,7 @@ class LRU {
   /**
    * Remove item from the linked list.
    * @private
-   * @param {LRUItem}
+   * @param {LRUItem} item
    */
 
   _removeList(item) {
@@ -420,8 +414,7 @@ class LRUItem {
   /**
    * Create an LRU item.
    * @constructor
-   * @private
-   * @param {String} key
+   * @param {String|Number} key
    * @param {Object} value
    */
 

package.json

@@ -16,13 +16,15 @@
   "main": "./lib/blru.js",
   "scripts": {
     "lint": "eslint lib/ test/",
+    "lint-types": "tsc -p .",
     "test": "bmocha --reporter spec test/*-test.js"
   },
   "dependencies": {
     "bsert": "~0.0.12"
   },
   "devDependencies": {
-    "bmocha": "^2.1.8"
+    "bmocha": "^2.1.8",
+    "bts-type-deps": "^0.0.3"
   },
   "engines": {
     "node": ">=8.0.0"

tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "include": [
+    "lib/**/*.js"
+  ],
+  "compilerOptions": {
+    "rootDir": ".",
+    "target": "ES2020",
+    "lib": [
+      "ES2020"
+    ],
+
+    "noEmit": true,
+
+    "allowJs": true,
+    "checkJs": true,
+    "maxNodeModuleJsDepth": 10,
+
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+
+    "stripInternal": true,
+    "noImplicitThis": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": false,
+
+    "typeRoots": [
+      "node_modules/bts-type-deps/types"
+    ]
+  }
+}