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20/05/2011
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Sometimes we need to JavaScript preload images on the web pages for some predicted purposes. And this post is a should-stop to read, because this post provides you 4 simple solutions to preload necessary images on your web pages using CSS, preload images with jQuery and JavaScript, Mootools preload images. All solutions are very simple to implement, please go to the full-post page for detailed instructions and JavaScript example codes.
Check our other solutions to preload your images:
- Best Ways to Preload Image JavaScript with CSS, AJAX
- Image Preloader MKII
- Preload Image with progress bar
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If you use an image for the background image of an element on a mouseOver or :hover
event(for example, navigation menu which images are used), the image
will not load until the first :hover event if you only apply that
background-image in the CSS for the :hover state. The preloader
will help you with this! It’ll load those images when the page loads
and stores them in your browsers cache. So avoid delays with rollover
effects. In this article, you’ll learn 4 ways to preload images with CSS
or javascript technique.
OPTION 1: Use A Little CSS(display:none;)
1 | #preloadedImages { |
2 | width: 0px; |
3 | height: 0px; |
4 | display: inline; |
5 | background-image: url(path/to/image1.png); |
6 | background-image: url(path/to/image2.png); |
7 | background-image: url(path/to/image3.png); |
8 | background-image: url(path/to/image4.png); |
9 | background-image: url(); |
10 | } |
and below is another sample:
1 | ul{ |
2 | margin: 0; |
3 | padding: 0; |
4 | list-style-type: none; |
5 | font: 13px ‘Lucida Grande’, Arial, sans-serif; |
6 | } |
7 | ul li{ |
8 | display: inline; |
9 | } |
10 | ul li a{ |
11 | display:block; |
12 | width:120px; |
13 | text-decoration: none; |
14 | padding: 0.3em 1em; |
15 | color: #000; |
16 | background:url(images/link.gif); |
17 | } |
18 | ul li a:hover{ |
19 | width:120px; |
20 | background:url(images/hover.gif); |
21 | } |
OPTION 2: Preload The Images With JavaScript
1 | <script type="text/javascript" language="JavaScript"> |
2 | companyLogo = new Image(); |
3 | companyLogo.src = "logo.gif"; |
4 | </script> |
You will need to have the two lines of JavaScript for each image you want to preload, and you will need to browser has to support JavaScript and have the two lines of JavaScript in your site.
OPTION 3: Automatically Preload images from CSS With jQuery
You can download a jQuery plugin from here, attached the jQuery javascript library and preloadCssImages.jQuery_v5.js to your page, and call $.preloadCssImages(); The source code like this:
1 | $(document).ready(function(){ |
2 | $.preloadCssImages(); |
3 | }); |
OPTION 4: Stick The Images In a Hidden Frame
A hidden frame is just a frame window set to 0%.
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20/05/2011
Sometimes we need to JavaScript preload images on...4 Simple Solutions To Preload Images using CSS or JavaScript - 4 Simple Solutions To Preload Images using CSS or JavaScript
