I've implemented tabs on my website that change the background image when clicked. However, I've noticed a slight delay in displaying the hover image for the first time after the DOM has loaded, creating a jarring effect.
I'm not sure how to troubleshoot this issue. Any suggestions? :)
Check out the live example here: http://jsfiddle.net/timkl/fjupq/ - although the delay is shorter on JSFiddle's server, it's still present.
To optimize loading times, consider using sprites instead of individual images.
With sprites, you can use a single image and toggle between different sections of that image to display various states. This method ensures the entire image is preloaded for quicker rendering.
An excellent example is Stack Overflow's sprite sheet:
You don't need to go to such lengths; having one image with both normal and hover states positioned differently can achieve similar results.
An easy remedy would be to utilize Javascript to preload the image. Add the following code to the HEAD section of your page:
<script type="text/javascript">
var newImg = new Image();
newImg.src = "http://exampleimage.com/300x150/000000/ccc"; // placeholder image
</script>
One alternative method is to showcase the image in a different location, such as towards the bottom of the page, disguised as a tiny 1px by 1px element, positioned outside the main layout. By doing so, the image will be preloaded.
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