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