Created
November 3, 2015 22:18
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Async Loader
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| var loader = { | |
| script: function ( url ) { | |
| var script = document.createElement( 'script' ); | |
| script.src = url; | |
| return script; | |
| }, | |
| css: function ( url ) { | |
| var link = document.createElement( 'link' ); | |
| link.rel = "stylesheet"; | |
| link.type = "text/css"; | |
| link.href = url; | |
| return link; | |
| }, | |
| task: function ( url ) { | |
| var item; | |
| if ( /js$/.test( url ) ) item = loader.script( url ); | |
| if ( /css$/.test( url ) ) item = loader.css( url ); | |
| return new Promise( function ( resolve ) { | |
| if ( !item ) { | |
| console.log( url + " must be js or css" ); | |
| return resolve(); | |
| } | |
| document.head.appendChild( item ); | |
| item.onload = resolve; | |
| item.onerror = resolve; | |
| } ); | |
| } | |
| } | |
| module.exports = function () { | |
| var urls = [].slice.call( arguments ); | |
| return new Promise( function ( resolve ) { | |
| function next() { | |
| if ( !urls.length ) return resolve(); | |
| var url = urls.shift(); | |
| loader.task( url ).then( next ); | |
| } | |
| next(); | |
| } ); | |
| }; |
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