wikijs-fork/client/modules/boot.js

69 lines
1.6 KiB
JavaScript

export default {
readyStates: [],
callbacks: [],
/**
* Check if event has been sent
*
* @param {String} evt Event name
* @returns {Boolean} True if fired
*/
isReady (evt) {
return this.readyStates.indexOf(evt) >= 0
},
/**
* Register a callback to be executed when event is sent
*
* @param {String} evt Event name to register to
* @param {Function} clb Callback function
* @param {Boolean} once If the callback should be called only once
*/
register (evt, clb, once) {
if (this.isReady(evt)) {
clb()
} else {
this.callbacks.push({
event: evt,
callback: clb,
once: false,
called: false
})
}
},
/**
* Register a callback to be executed only once when event is sent
*
* @param {String} evt Event name to register to
* @param {Function} clb Callback function
*/
registerOnce (evt, clb) {
this.register(evt, clb, true)
},
/**
* Set ready state and execute callbacks
*/
notify (evt) {
this.readyStates.push(evt)
this.callbacks.forEach(clb => {
if (clb.event === evt) {
if (clb.once && clb.called) {
return
}
clb.called = true
clb.callback()
}
})
},
/**
* Execute callback on DOM ready
*
* @param {Function} clb Callback function
*/
onDOMReady (clb) {
if (document.readyState === 'interactive' || document.readyState === 'complete' || document.readyState === 'loaded') {
clb()
} else {
document.addEventListener('DOMContentLoaded', clb)
}
}
}