simple-eventer

Simple events interface for es6/babel classes.

installation

Install from npm:

$ npm install simple-eventer

usage

Use it as base class for your module.

import SimpleEventer from 'simple-eventer';

class Example extends SimpleEventer {
  constructor() {
    super();

    this.seconds = 0;

    setInterval(() => {
      this.seconds += 1;
      // Fire your event
      this.fire('onesecond', this.seconds);
    }, 1000);
  }
}

Bind events to your module.

// Bind your event
(new Example()).on('onesecond', (event) => {
  console.log(`Type: ${event.type}, Target/Data: ${event.target}`);
});
// Type: onesecond, Target/Data: 1
// Type: onesecond, Target/Data: 2
// Type: onesecond, Target/Data: 3

Or use events globally

let seconds = 0;

setInterval(() => {
  seconds += 1;
  // Fire your event
  SimpleEventer.fire('onesecondGlobal', seconds);
}, 1000);

// Bind your event
SimpleEventer.on('onesecondGlobal', (event) => {
  console.log(`Type: ${event.type}, Target/Data: ${event.target}`);
});
// Type: onesecondGlobal, Target/Data: 1
// Type: onesecondGlobal, Target/Data: 2
// Type: onesecondGlobal, Target/Data: 3

methods

Three methods are available.

fire(type, [target])

Emmiting event of inheriting module with provided type. Target becomes this if not specified.

// Called inside your module where this is the module instance
this.fire('eventtype', this.target);

// Called on your module instance - like trigger in jQuery
module.fire('eventtype', module.target);

on(type, listener)

Registers listener for event of provided type.

function listener(event) {
  console.log(event.type);
  // eventtype
  console.log(event.target);
  // module.target
}

module.on('eventtype', listener);

off(type, listener)

Removes listener for event of provided type.

module.off('eventtype', listener);