jQuery is a small and feature-rich JavaScript library that simplifies HTML document manipulation, event handling, animation, and Ajax interactions through an easy-to-use API, working across many browsers.
1. What is jQuery?
jQuery is a fast, small, and feature-rich JavaScript library. It
makes things like HTML document traversal and
manipulation, event handling, animation, and Ajax much
simpler with an easy-to-use API that works across a multitude
of browsers.