Where is jquery installed

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Last updated: April 8, 2026

Quick Answer: jQuery is typically installed in a web project's directory structure, commonly in a 'js' or 'lib' folder, or via CDN links. It was first released on August 26, 2006, by John Resig, and as of 2024, it's used by over 77% of the top 1 million websites according to W3Techs. Installation methods include downloading from jquery.com, using package managers like npm, or linking to CDN services.

Key Facts

jQuery was first released on August 26, 2006
As of 2024, jQuery is used by over 77% of the top 1 million websites
The current stable version is jQuery 3.7.1 (as of August 2023)
jQuery can be installed via npm with 'npm install jquery'
jQuery's file size for the minified production version is about 30KB

Overview

jQuery is a fast, small, and feature-rich JavaScript library designed to simplify HTML document traversal, event handling, animation, and Ajax interactions for rapid web development. Created by John Resig in 2006, it revolutionized front-end development by providing a consistent API that worked across different browsers, addressing the fragmentation issues of early 2000s web browsers. The library quickly gained popularity due to its "write less, do more" philosophy, becoming one of the most widely adopted JavaScript tools in web history.

Over its nearly two decades of existence, jQuery has evolved through multiple major versions, with jQuery 1.x supporting older browsers like Internet Explorer 6-8, jQuery 2.x dropping legacy browser support, and jQuery 3.x introducing modern features and performance improvements. Despite the rise of modern JavaScript frameworks like React and Vue.js, jQuery remains extensively used in legacy systems, content management systems like WordPress, and many enterprise applications where its simplicity and backward compatibility are valued.

How It Works

jQuery installation involves placing the library files in accessible locations within a web project's structure.

Local Installation: Developers typically download jQuery files from jquery.com and place them in project directories like 'js/' or 'lib/'. The current stable version 3.7.1 includes both development (uncompressed, ~280KB) and production (minified, ~30KB) versions. Local installation ensures offline availability and control over version management, though it requires manual updates.
Package Manager Installation: Using npm (Node Package Manager), developers can install jQuery with 'npm install jquery', which places it in the node_modules directory. This method, popular in modern development workflows, allows version specification in package.json and integrates with build tools like Webpack or Gulp for bundling and optimization.
CDN Installation: Content Delivery Networks like Google CDN, Microsoft CDN, or jQuery's own CDN host jQuery files globally. A typical CDN link looks like 'https://code.jquery.com/jquery-3.7.1.min.js'. CDNs offer performance benefits through caching across websites, with Google's CDN serving jQuery to millions of sites daily, potentially reducing load times by 50-60% compared to local hosting in some cases.
Framework Integration: Many web frameworks and CMS platforms include jQuery automatically. WordPress, which powers over 43% of all websites, bundles jQuery with its core installation. Similarly, Bootstrap versions before 5.0 had jQuery as a dependency, though Bootstrap 5 removed this requirement in 2021.

Key Comparisons

Feature	Local Installation	CDN Installation
Performance	Depends on server speed; no external dependencies	Often faster due to global caching and edge servers
Availability	Always available offline; controlled environment	Requires internet connection; subject to CDN uptime
Version Control	Full control over specific versions and updates	Easy to switch versions by changing URL; automatic updates possible
Security	No external script risks; complete audit trail	Trusted CDNs reduce risks; potential supply chain vulnerabilities
Bandwidth Impact	Uses your server bandwidth for each request	Offloads bandwidth to CDN; cached across sites reduces overall traffic

Why It Matters

Cross-Browser Compatibility: jQuery's unified API handles browser differences automatically, saving developers from writing separate code for different browsers. Before jQuery, developers spent approximately 20-30% of their time addressing browser-specific issues, which jQuery reduced significantly.
Development Efficiency: jQuery's concise syntax allows common tasks to be accomplished with fewer lines of code—typically 30-70% less than equivalent vanilla JavaScript. This efficiency contributed to its peak popularity around 2014-2017 when it was used by over 90% of the top 10,000 websites.
Ecosystem Impact: jQuery spawned thousands of plugins and influenced modern JavaScript development patterns. The jQuery Foundation, established in 2012, helped standardize JavaScript practices and eventually merged with the JS Foundation in 2017 to form the OpenJS Foundation, which now oversees jQuery's development.

Looking forward, jQuery continues to serve as a bridge between legacy systems and modern web development. While newer frameworks dominate greenfield projects, jQuery's installation flexibility—whether local, via CDN, or through package managers—ensures it remains relevant for maintaining existing applications, educational purposes, and scenarios where its lightweight footprint (just 30KB minified) provides advantages over heavier modern alternatives. The library's ongoing maintenance and compatibility updates suggest it will remain part of the web ecosystem for years to come, particularly in enterprise environments where stability and backward compatibility are paramount.