## 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. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.

### Attributes

.attr()

.html()

.prop()

.removeAttr()

.removeProp()

### CSS

.addClass()

.css()

.hasClass()

.height()

.innerHeight()