@mighty-little/event-emitter

Simple event-emitter implementation

Usage

Example:

type Foo = {
  foo: string;
}

const emitter = new EventEmitter();

const onFooHandler = (data?: Foo) => console.log("'on' triggered", data);

emitter.once<Foo>("foo", (data?: Foo) => console.log("'once' triggered", data));
emitter.on<Foo>("foo", onFooHandler);
emitter.emit<Foo>("foo", {foo: "bar"});
emitter.emit<Foo>("foo", {foo: "baaz"});
emitter.off<Foo>("foo", onFooHandler);
emitter.emit<Foo>("foo", {foo: "quux"});

// Output:
// 'once' triggered { foo: 'bar' }
// 'on' triggered { foo: 'bar' }
// 'on' triggered { foo: 'baaz' }

Installation

npm install

Development

Build:

npm run build

Run tests:

npm run test

Build docs:

npm run typedoc

Author

• John Newton

Copyright

• John Newton

License

Apache-2.0