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/** | |
* Helper function for passing arrays of promises to $.when | |
*/ | |
jQuery.whenArray = function ( array ) { | |
return jQuery.when.apply( this, array ); | |
}; | |
/** | |
* Accepts a single image src or an array of image srcs. | |
* @return Promise that resolves once images have loaded. | |
*/ | |
function preloadImages (srcs) { | |
var dfd = $.Deferred(), | |
promises = [], | |
img, | |
l, | |
p; | |
if (!$.isArray(srcs)) { | |
srcs = [srcs]; | |
} | |
l = srcs.length; | |
for (var i = 0; i < l; i++) { | |
p = $.Deferred(); | |
img = $("<img />"); | |
img.load(p.resolve); | |
img.error(p.resolve); | |
promises.push(p); | |
img.get(0).src = srcs[i]; | |
} | |
$.whenArray(promises).done(dfd.resolve); | |
return dfd.promise(); | |
} |
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