Class PPT

Agenda

• jQuery
• AJAX

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.
• It is a lightweight, "write less, do more", JavaScript library.
• With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.
• The jQuery library contains the following features:
  1. HTML/DOM manipulation
  2. CSS manipulation
  3. HTML event methods
  4. Effects and animations
  5. AJAX

Adding jQuery

• The jQuery library is a single JavaScript file, and you reference it with the HTML <script> tag.
• Make sure that the script tag should be inside the head section.

Basic Syntax

$(selector).action()

• $ sign to define/access jQuery
• (selector) to "query (or find)" HTML elements
• action() to be performed on the element(s)

Example

• $(this).hide() - hides the current element.