jQuery is a lightweight, "write less, do more", JavaScript library.jQuery is a JavaScript library that allows web developers to add extra functionality to their websites. It is open source and provided for free under the MIT license. In recent years, jQuery has become the most popular JavaScript library used in web development. The purpose of jQuery is to make it much easier to use JavaScript on your website. jQuery takes a lot of common tasks that require many lines of JavaScript code to accomplish, and wraps them into methods that you can call with a single line of code. jQuery also simplifies a lot of the complicated things from JavaScript, like AJAX calls and DOM manipulation. The jQuery library contains the following features: • HTML/DOM manipulation • CSS manipulation • HTML event methods • Effects and animations • AJAX • Utilities JQUERY Quick Reference Guide. CONTENTS ▬▬▬▬▬ ✓ Introduction ✓ Ajax ✓ Effects ✓ HTML ✓ Misc ✓ Traversing