jQuery: When an Old Friend Beats the New Ones, or How a Web Development Legend Keeps Surprising Us
Remember the times when frontend was the Wild West, and cross-browser compatibility was a real curse. Every interaction with the DOM required a dozen lines of code and conditional statements just to please all browsers. Familiar situation, right? It was into this chaos that jQuery burst in, like a knight on a white horse, and forever changed the rules of the game. It didn't just simplify the lives of millions of developers, but also laid the foundation for many modern approaches in web development.
Today, when React, Vue, and Angular rule the roost, many might think: "jQuery? That's a dinosaur!" And they'd be wrong. The project lives, evolves, and, most interestingly, adapts to new realities. Let's take a look at how jQuery can be useful in 2024 and why its GitHub repository still deserves your attention.
jQuery: More Than Just a Library
For those who may have never encountered jQuery (yes, they exist!), it's a JavaScript library that significantly simplifies HTML document manipulation (DOM), event handling, creating animations, and server interaction via AJAX. Its philosophy — "write less, do more" — became a true hit. Remember document.getElementById('myId').style.color = 'red';? With jQuery it turned into $('#myId').css('color', 'red'); — pure magic!
Who needs this today? Actually, many people:
- Legacy project support: Millions of websites still run on jQuery. If you maintain legacy code, you can't do without it.
- Rapid prototyping: Need to quickly whip up an interactive prototype? jQuery will handle it in no time.
- Small projects without frameworks: For landing pages, simple business card sites, or small utilities where including a heavy framework would be excessive, jQuery is the perfect option.
- Educational purposes: Understanding the basics of DOM manipulation and events through jQuery is an excellent foundation before diving into more complex frameworks.
Key Features That Are Still Relevant
Despite its age, jQuery's core features remain extremely convenient:
Selectors on Steroids
Selecting elements on a page using CSS selectors — this is what people still love jQuery for. Simple, intuitive, and incredibly powerful. Want to select all links inside a block with class menu? Here you go: $('.menu a'). And then immediately apply an action to them, like adding a class: $('.menu a').addClass('active');.
AJAX Without the Headache
Working with asynchronous requests has always been tricky. jQuery made it elementary. Sending a GET request and handling the response is literally a couple of lines:
$.get('/api/data', function(data) {
console.log('Данные получены:', data);
});
For more complex scenarios, there's the universal $.ajax() that gives you full control over the request.
Bringing the Interface to Life: Animations and Effects
Smooth hiding, appearing, sliding of elements — all of this is easily implemented with jQuery. Creating a beautiful animation that makes your interface more lively is possible without deep knowledge of CSS animations:
$('#myElement').slideUp(500, function() {
console.log('Элемент скрыт!');
});
Working with Events: Simple and Reliable
Assigning event handlers, delegating them, removing them — all of this is intuitive and cross-browser. The .on() method became a standard for working with events:
$('#myButton').on('click', function() {
alert('Кнопка нажата!');
});
jQuery in 2024: Adapting to the Modern World
Don't think jQuery got stuck in the past. The repository is actively developed, and this is evident from the version support:
- Version 4.x: Currently in beta, which speaks to the constant work on the library.
- Version 3.x: Actively maintained and receiving updates. This is your workhorse for most projects.
But the most interesting part is the adaptation to modern standards. jQuery now supports ECMAScript modules (ESM), allowing you to import it as a regular module in your modern JavaScript code. Plus, it can be used in Node.js and even in browser extensions.
Build Your Own jQuery: Custom Build for Minimalists
Here's where we come to one of the coolest and, in my opinion, most underrated features of modern jQuery — the ability to create custom builds. Why drag in the whole combine when you only need a blender? The jQuery developers understand this perfectly and give you tools to create your own, lightweight version of the library.
Imagine you only need AJAX requests and basic DOM manipulation, but don't need animations and complex selectors. In a normal situation, you'd include the entire library. But with jQuery, you can build it without unnecessary modules!
For this, you'll need Node.js and Git. Clone the repository:
git clone https://github.com/jquery/jquery.git
cd jquery
npm install
Then, to build your unique version, use the npm run build command with the --exclude option:
npm run build -- --exclude=ajax/jsonp -e css -e deprecated -e dimensions -e effects -e offset -e wrap
This command will exclude JSONP modules, CSS manipulation (along with dependent effects, dimensions, offsets), deprecated methods, animations, and element wrapping methods from the build. As a result, you'll get a significantly smaller jquery.js file that contains only the functionality you need. This is the perfect solution for performance optimization, especially on mobile devices!
By the way, there's even a special alias for creating the official jQuery Slim build, which excludes AJAX, effects, and deprecated methods:
npm run build -- --filename=jquery.slim.js --slim
You can also specify the filename, build directory, and even build jQuery as an ECMAScript module (--esm) or factory (--factory) for use in specific environments.
For Contributors and the Curious: Looking Under the Hood
If you want to not just use jQuery, but also contribute or simply understand how such a massive library works, the repository offers detailed guides on contributing. This is a great opportunity to become part of history and level up your skills.
Testing — The Foundation of Stability
Of course, such a project can't exist without thorough testing. jQuery uses QUnit — a JavaScript unit testing framework, which, by the way, was created by the jQuery developers themselves. You can run tests locally to ensure the stability of changes or just study how tests are written for a large library. Here's all you need:
npm install
npm start
Then open the test server (for example, using WAMP/MAMP/LAMP) and navigate to the appropriate URL. The README even lists useful methods for working with tests, like q() for getting elements by ID or fireNative() for simulating native DOM events.
Git Magic for Advanced Users
jQuery developers share useful Git tricks that can come in handy not only when working on this project but also in your everyday practice. For example, commands for cleaning the working directory to upstream/main state:
git reset --hard upstream/main
git clean -fdx
Or setting up automatic rebasing on git pull for a cleaner commit history:
git config branch.autosetuprebase local
And if you've ever dealt with merge conflicts, git mergetool is your savior. The README even lists hotkeys for convenient use. A small thing, but nice!
Conclusions: Is jQuery Worth Your Attention Today?
Absolutely, yes! jQuery is not just a relic of the past, but a living, evolving project that continues to provide value. Its low barrier to entry, huge plugin ecosystem (though we didn't discuss them in this article, but they exist!), and, most importantly, the ability to create custom, lightweight builds make it a relevant tool in certain scenarios.
If you're working on projects where development speed without a complex framework is important, maintaining old code, or just want to have a fast and reliable tool for DOM manipulation and AJAX in your arsenal, then jQuery is your choice. And the ability to build it to your specific needs? That's just the cherry on top that lets you breathe new life into the good old library and make it truly modern.
So, if you haven't checked out the jQuery repository on GitHub yet, now's the time. You might find exactly what you were looking for!
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