Created
August 19, 2012 13:42
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Simple javascript image preloader
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| // Executes callback after loading all images defined by imageHash | |
| // Uses underscore.js | |
| var preloadImages = function(imageHash, callback) { | |
| var totalImages = _.size(imageHash) | |
| var images = {} | |
| var loadImage = function(imageUrl, key) { | |
| var img = new Image() | |
| img.src = imageUrl | |
| img.onload = function () { | |
| images[key] = img | |
| if (_.size(images) == totalImages) | |
| callback(images) | |
| } | |
| } | |
| _.each(imageHash, loadImage, this) | |
| } | |
| // Usage: | |
| var images = { | |
| car: "car.png", | |
| train: "train.png" | |
| } | |
| preloadImages(images, function(x) { | |
| console.log(x) | |
| }) |
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