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.
Q: What is jQuery?
A: jQuery is a JavaScript library designed to simplify HTML DOM tree traversal
and manipulation, as well as event handling, CSS animation, and Ajax. It is
free, open-source software using the permissive MIT License. As of May 2019,
jQuery is used by 73% of the 10 million most popular websites