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tiny-typed-emitter\n\nHave your events and their listeners type-checked with [no overhead](#no-overhead).\n\n[![npm version](https://badge.fury.io/js/tiny-typed-emitter.svg)](https://badge.fury.io/js/tiny-typed-emitter)\n\n## Install\n Simply add the dependency using **npm**:\n```console\n$ npm i tiny-typed-emitter\n```\n or using **yarn**:\n```console\n$ yarn add tiny-typed-emitter\n```\n\n## Usage\n\n1. import **tiny-typed-emitter** library:\n\n ```ts\n import { TypedEmitter } from 'tiny-typed-emitter';\n ```\n\n2. define events and their listener signatures (**note:** quotes around event names are not mandatory):\n ```ts\n interface MyClassEvents {\n 'added': (el: string, wasNew: boolean) => void;\n 'deleted': (deletedCount: number) => void;\n }\n ```\n\n3. on this step depending on your use case, you can:\n - define your custom class extending `EventEmitter`:\n ```ts\n class MyClass extends TypedEmitter {\n constructor() {\n super();\n }\n }\n ```\n - create new event emitter instance:\n ```ts\n const emitter = new TypedEmitter();\n ```\n\n## Generic events interface\nTo use with generic events interface:\n\n```ts\ninterface MyClassEvents {\n 'added': (el: T, wasNew: boolean) => void;\n}\n\nclass MyClass extends TypedEmitter> {\n\n}\n```\n\n## Compatible subclasses with different events\n\nThe type of `eventNames()` is a superset of the actual event names to make\nsubclasses of a `TypedEmitter` that introduce different events type\ncompatible. For example the following is possible:\n\n```ts\nclass Animal=ListenerSignature> extends TypedEmitter<{spawn: () => void} & E> {\n constructor() {\n super();\n }\n}\n\nclass Frog> extends Animal<{jump: () => void} & E> {\n}\n\nclass Bird> extends Animal<{fly: () => void} & E> {\n}\n\nconst animals: Animal[] = [new Frog(), new Bird()];\n```\n\n## No Overhead\nLibrary adds no overhead. All it does is it simply reexports renamed `EventEmitter`\nwith customized typings.\nYou can check **lib/index.js** to see the exported code.\n","_attachments":{},"homepage":"https://github.com/binier/tiny-typed-emitter#readme","bugs":{"url":"https://github.com/binier/tiny-typed-emitter/issues"},"license":"MIT"}