event-trigger

Simple event emitter/trigger-er class

Install

npm install --save event-trigger

Usage

Simple event

import EventTrigger from 'event-trigger';
 
const events = new EventTrigger();
events.on('custom-event', (event, data) => {
    console.log(data);
    // '🍔'
});
 
events.trigger('custom-event', '🍔');

events.off('custom-event');

Multiple event type on one function

const event2 = new eventTrigger();
event2.on('start stop', (event, data) => {
    console.log(event.type, data);
    if (event.type === 'start') {
        event2.trigger('stop', 'video');
    }
});
event2.trigger('start', 'video');

Chained

const event3 = new eventTrigger();
event3.on('start', (event, data) => {
    console.log(event.type, data);
    event3.trigger('stop', 'video');
}).on('stop', (event, data) => {
    console.log(event.type, data);
});
event3.trigger('start', 'video');

Stop listening

const event4 = new eventTrigger();
event4.on('start stop', (event, data) => {
    console.log(event.type, data);
    if (event.type === 'start') {
        event4.trigger('stop', 'video');
    }
});
event4.trigger('start', 'video');
event4.off('start' /*2nd parameter: function if only one*/);
event4.trigger('start', 'video again');
event4.off();
event4.trigger('stop', 'stop again');

Trigger only once

let hotdog;
const event = new eventTrigger();
event.one('custom-event-one', (event, data) => {
    hotdog = data; // '🌭'
});
event.trigger('custom-event-one', '🌭');
event.trigger('custom-event-one', '🍔');
console.log(event); // 🌭

Demo

https://zoli-fischer.github.io/event-trigger/index.html

License

MIT zoli-fischer