On January 14, 2006, John Resig unveiled a small JavaScript library during a BarCamp in New York City. He called it jQuery. Its mission was simple but revolutionary: to make DOM manipulation easy and consistent across all browsers. Today, in 2026, we celebrate twenty years of a tool that did more than just simplify code it democratized web development and invited web designers to code.
The Problem jQuery Solved: The Wild West of Browsers
To understand why jQuery became the most popular JavaScript library in history, one must remember the web of the mid-2000s. Developers were trapped in a “browser war” between Internet Explorer, Firefox, and Safari. Writing a simple script often required three different versions of the same code to ensure it functioned across different platforms.
jQuery introduced the dollar sign function $() and the concept of chaining. Suddenly, complex tasks that took twenty lines of vanilla JavaScript could be accomplished in one. It provided a unified API that “just worked,” allowing developers to focus on building features rather than debugging browser inconsistencies. No more browser differences that developers needed to fight. The cross-browser nightmare of just adding a event to an element was gone thanks to jQuery.
New developers might not know but jQuery was everywhere. There were conferences, books written, and there was even more passion on jQuery than any of the JavaScript libraries and frameworks after jQuery. jQuery was the library that made JavaScript popular because any developer at any level can pick up jQuery and do a lot with few lines of code. In fact, after jQuery there was a trend of calling some front-end developers Ninjas and Masters.
The 2026 Milestone: The Launch of jQuery 4.0
The 20th anniversary is marked by more than just reflection. The recent release of jQuery 4.0 signals a significant modernization of the library. While many predicted its demise with the rise of React, Vue, and Angular, the jQuery team has continued to evolve.
Key updates in the 20th-anniversary release include:
- Migration to ES Modules: jQuery source code has officially moved from AMD to ES modules, making it compatible with modern build tools like Rollup and Vite.
- Removal of IE Legacy Code: Support for Internet Explorer 10 and older has been dropped, resulting in a significantly smaller and faster library.
- Trusted Types Support: Enhanced security through the support of Trusted Types, helping developers comply with modern Content Security Policy (CSP) requirements.
Why the Web Still Runs on jQuery
Despite the “framework fatigue” of the last decade, jQuery remains an absolute titan of the internet. As of 2026, it is still utilized by over 75% of the top 10 million websites. Its dominance is driven by three main factors:
- The CMS Ecosystem: Global platforms like WordPress, which powers nearly half the web, still rely on jQuery for their core functionality and vast plugin ecosystems.
- Legacy Stability: For massive enterprise applications, “if it is not broken, do not fix it” is a mantra. Millions of sites run perfectly on jQuery, and a full rewrite into a modern framework often provides little ROI for the associated risk.
- Simplicity for Small Projects: For landing pages or simple interactive elements, the overhead of a modern reactive framework is often unnecessary. jQuery remains the fastest way to add a bit of “magic” to a page. Even when modern JavaScript already has all the features natively, people still rely in jQuery if the library was already installed by default in project.
The Legacy of Innovation
jQuery’s greatest success is, paradoxically, its own obsolescence in certain areas. Many of the features we take for granted in modern “Vanilla” JavaScript—such as document.querySelector and the Fetch API—were directly inspired by jQuery’s syntax and ease of use. The library pushed browser manufacturers to standardize their APIs, effectively fixing the very problems jQuery was created to solve.
As we look toward the next decade of development, we tip our hats to the library that taught us to write less and do more.