JQuery Basics :
- jQuery is a JavaScript Library.
- jQuery greatly simplifies JavaScript programming.
- jQuery is easy to learn.
Before you start studying jQuery, you should have a basic knowledge of:
- HTML
- CSS
- JavaScript
What is jQuery?
- 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.
- jQuery also simplifies a lot of the complicated things from JavaScript, like AJAX calls and DOM manipulation.
The jQuery library contains the following features:
- HTML/DOM manipulation
- CSS manipulation
- HTML event methods
- Effects and animations
- AJAX
- Utilities
Tip: In addition, jQuery has plugins for almost any task out there.
Downloading jQuery :
There are two versions of jQuery available for downloading:
- Production version - this is for your live website because it has been minified and compressed
- Development version - this is for testing and development (uncompressed and readable code)
The jQuery library is a single JavaScript file, and you reference it with the HTML <script> tag (notice that the <script> tag should be inside the <head> section):
ex: <head>
<script src="jquery-1.10.2.min.js"></script>
</head>
Alternatives to Downloading
Both Google and Microsoft host jQuery.
To use jQuery from Google or Microsoft, use one of the following:
ex : <head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
</head>
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