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POjquery how to call an image preloader recursively
 

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  1. POjquery how to call an image preloader recursively
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    <p>I have a very simple jQuery preloader that works ok (i believe the code is correct but please go ahead and check it out)...<br> What i'm trying to do is, if the image fails to download, then try another variation of the image until you find one.... there's only upto 4 variations that is represented by a number inside the path.</p> <p>Let me explain:<br> An image path could be as following<br> .../images/800px/image1.jpg</p> <p>if that one fails, then try<br> .../images/350px/image1.jpg</p> <p>if that one fails, then try<br> .../images/100px/image1.jpg</p> <p>if that one fails, then try<br> .../images/50px/image1.jpg</p> <p>if that one fails, then try<br> .../images/30px/image1.jpg </p> <p>if you notice, the diference in all of those variations, is the number inside the path... that is 800, 350, 100, 50, 30 </p> <p>Now, in the function load_img (below) i was thinking of using the .error atribute to call the function recursively until it finds an image..</p> <p>IS this the best approach? any hints or best practices on how to achieve this?</p> <p>Thanks in advance<br> Marco </p> <p>Here's a sample of the code</p> <pre><code>&lt;div id="zoom-artwork"&gt;&lt;/div&gt; &lt;ul class="nav-zoom-artwork"&gt; &lt;li&gt;&lt;a href=".../images/800px/image1.jpg"&gt;image doesn't exist...&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href=".../images/800px/image2.jpg"&gt;image 2&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href=".../images/800px/image3.jpg"&gt;image 3&lt;/a&gt;&lt;/li&gt; &lt;/ul&gt; ... $('#nav-zoom-artwork a').click(function(e) { var src = $(this).attr('href'); var alt = $(this).children('img').attr('alt'); load_img(src, alt); e.preventDefault(); }); // ZOOM artwork function load_img(src, alt) { var img = new Image(); $(img).load(function() { // set the image hidden by default $(this).hide(); // remove the loading class, then insert the image $('#zoom-artwork').removeClass('loading').html(this); // fade in the image to create a nice effect $(this).fadeIn(400); }) .error(function() { alert('try another size... call the function recursively with another path...'); }) .attr({ src:src, alt:alt }); } </code></pre>
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