DOM Emit

A micro-lib (es6 module) for emitting custom events in the DOM. For modern browsers and IE9+

import emit from 'dom-emit';

emit('my-event-name');
emit.from(document.body, 'my-event-name');
[document.body, window].map( emit.map('my-event-name') );

Usage

emit('my-event-name', detail)

Emits a custom event named my-event-name from the window passing along data in the detail variable. detail is optional.

emit('my-event', {food: 'pizza'});

emit.from(elm, 'my-event-name', detail)

Emits a bubbling custom event named my-event-name from element elm passing along data in the detail variable. detail is optional.

emit.from(document.body, 'my-event', {food: 'pizza'});

emit.map('my-event-name', detail)

Produces lambda function to be included in a map/forEach function. detail is optional.

[].slice.call(document.querySelector('p'))
    .map( emit.map('my-event') );

Optional Hyper-Modularity

emit, .from, and .map can be used separately.

// just the map functionality
import emitMap from 'dom-emit/map';

// just the .from functionality
import emitFrom from 'dom-emit/from';

// just the basic functionality
import emit from 'dom-emit/emit';

Listening

Listening for these emitted events happens via standard event-listeners.

window.addEventListener('my-event', function(e) {

    //true if emitted from window.
    e.target===window;

    // true if emmited via `emit.from()`
    e.target===document.querySelector('.my-element');

    // contains any data that passed along
    console.log(e.detail);
}