BookStack/resources/assets/js/services/events.js

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/**
* Simple global events manager
*/
class Events {
constructor() {
this.listeners = {};
this.stack = [];
}
emit(eventName, eventData) {
this.stack.push({name: eventName, data: eventData});
if (typeof this.listeners[eventName] === 'undefined') return this;
let eventsToStart = this.listeners[eventName];
for (let i = 0; i < eventsToStart.length; i++) {
let event = eventsToStart[i];
event(eventData);
}
return this;
}
listen(eventName, callback) {
if (typeof this.listeners[eventName] === 'undefined') this.listeners[eventName] = [];
this.listeners[eventName].push(callback);
return this;
}
}
export default Events;