jQuery 101

Javascript 

• JavaScript (including jQuery) can be used to add interactivity to a web page beyond that which is possible merely with HTML and CSS.

jQuery is JavaScript

• It is a JavaScript library, so it operates on top of JavaScript.

• It cannot exist on its own, so you can't use one over the other.

• You can use just JavaScript or JavaScript and jQuery.

Why jQuery

• jQuery is designed to make many JavaScript development tasks much easier.
• Use jQuery when it will significantly reduce your development time,
• and you can afford the extra overhead of downloading the library.