jQuery Library
- Special installation and compilation is not required to execute a program.
- Download and include the jquery library file into the .html files.
CDN based version
- jQuery library can be included directly in the HTML code from Content Delivery Network (CDN).
- Latest version of the content deliver is provided by Google and Microsoft.
- Google CDN : https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js
- Microsoft CDN : http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.12.2.min.js
Steps to write jQuery code
- Download jQuery library (jquery.js or jquery-1.3.2.min.js).
- Create a new folder in any directory of your choice.
- Drag and drop the jquery.js file into the folder that is created by you.
- Create a reference of jQuery library in the html file by adding the following snippet in a web page.
<head>
<script type = “text/javascript” src = “jquery.js”>
</script>
</head>
jQuery Syntax
The jQuery syntax is written to select the HTML elements and perform some action on these elements.Syntax:
$(selector).action()
where,
$ sign defines the jQuery.
(selector) finds the HTML elements.
action() is type of event that performs some type of action on the elements like click, hide etc.
Example:
1. $(document).ready(function() {….})
It prevents any jQuery code from getting executed before the document is ready or loaded.
2. $(this).hide()
It hides the current element.
