jQuery is a lightweight, "write less, do more", JavaScript library. 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 Tip: In addition, jQuery has plugins for almost any task out there