jQuery is a popular JavaScript library that makes writing JavaScript faster and easier. Instead of writing long, complex vanilla JavaScript, jQuery lets you do the same thing with shorter, simpler code. It was the go-to tool for web developers for over a decade and is still used widely today.
What jQuery Does
- Select and manipulate HTML elements easily
- Handle events like clicks, hovers, and form submissions
- Animate elements (show, hide, fade, slide)
- Make AJAX requests to load content dynamically
- Work consistently across different browsers
jQuery in WordPress
WordPress ships with jQuery built-in and loads it on the frontend by default. Many WordPress themes and plugins rely on jQuery for interactive features. It’s available out of the box, so plugin developers don’t need to include their own copy.
Is jQuery Still Relevant?
Modern browsers handle much of what jQuery was needed for natively. Many new JavaScript frameworks (React, Vue, Alpine.js) have replaced it for complex applications. However, because WordPress still bundles it and so many plugins depend on it, jQuery remains very relevant for the WordPress ecosystem.
Common Issue
Sometimes jQuery loads in no-conflict mode in WordPress to prevent clashes between plugins. If you see dollar sign undefined errors, replace the dollar sign shortcut with the word jQuery in your custom scripts to fix it.
Related: JavaScript
