How Effective is a Simple JavaScript Function for Preloading Images in Modern Browsers?

Preloading Images with JavaScript

One way to improve the perceived performance of your website is to preload images before they are needed. JavaScript provides a simple way to do this. The following function will preload an image:

function preloadImage(url)
{
    var img=new Image();
    img.src=url;
}

To preload a list of images, you can simply loop over the list and call the preloadImage function for each image.

Is This Function Sufficient for Modern Browsers?

The function provided is sufficient to preload images in most, if not all, browsers commonly used today. It has been tested and confirmed to work in the following browsers:

• Chrome
• Firefox
• Safari
• Edge
• Opera

Additionally, since the function relies on the HTML5 Image object, it is also supported by most modern mobile browsers.

Conclusion

If you need a simple way to preload images in JavaScript, the function provided above is a good option. It is easy to use and supports most major browsers.

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