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oreshinya/create_js_for_preload_images.rb

Created November 2, 2012 15:31
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create js for preload images
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create_js_for_preload_images.rb
IMAGES_PATH = "images/"
OUTPUT_PATH = "javascripts/"
images = Dir.glob(IMAGES_PATH + "**/*.jpg").join("','")
js_str = <<-JS_STR
(function() {
var image_preloader = {
images: ['#{images}'],
done: function() {
for (var i = 0; i < this.images.length; i += 1) {
(new Image()).src = this.images[i];
}
}
};
image_preloader.done();
})();
JS_STR
open(OUTPUT_PATH + 'preload_images.js', 'w'){|f| f.write js_str}
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