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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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