Possible To Defer Loading Of Jquery

When developing websites, it's essential to optimize loading times for better user experiences. One common practice to achieve this is by deferring the loading of certain scripts like jQuery. So, is it possible to defer loading jQuery? Yes, it is!

Defer loading jQuery means delaying the script's loading until after the main content on your website has finished loading. This can help speed up the initial loading time of your site, as jQuery can be a hefty library to load, especially on slower connections.

To defer loading jQuery, you can use a straightforward method employing vanilla JavaScript. Here's how you can do it:

function deferjQuery() {
    var script = document.createElement('script');
    script.src = 'https://code.jquery.com/jquery-3.6.0.min.js';
    script.type = 'text/javascript';
    script.async = true;
    document.getElementsByTagName('head')[0].appendChild(script);
}

document.addEventListener('DOMContentLoaded', deferjQuery);

In this script, a new `` element is created dynamically, pointing to the jQuery library's URL. By setting the `async` attribute to true, the browser won't block the page rendering to download the script, ensuring faster loading. The script is then appended to the `` section of the document. The `deferjQuery` function is then triggered when the DOM content has finished loading.

An alternative method to achieve the same goal is to use the `defer` attribute in the `` tag when including jQuery in your HTML:

By adding the `defer` attribute, the browser will download jQuery in parallel with other resources and execute it only after the HTML content has been parsed, improving loading performance.

It's worth noting that deferring jQuery loading might affect the functionality of your site if you have scripts dependent on jQuery executing before the library loads. Ensure proper testing and consider the dependencies of your scripts when implementing this technique.

Deferring jQuery loading is just one way to optimize your website's performance. It can be particularly beneficial if you have a content-heavy site with many scripts to load. Combine it with other optimization techniques like minifying and bundling scripts to further enhance your site's speed.

Remember, always test the changes you make to ensure they improve, not hinder, your website's performance. By implementing deferring techniques wisely, you can strike a balance between functionality and loading speed, providing users with a seamless browsing experience.