jQuery is a fast, small, and feature-rich JavaScript library with a nice motto − Write less, do more.
jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
//your code goes here
});
</script>
</head>
//your code goes here
});
jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.
jQuery is a JavaScript toolkit designed to simplify various tasks by writing less code. Here is the list of important core features supported by jQuery −
1)DOM manipulation − The jQuery made it easy to select DOM elements, traverse them and modifying their content by using cross-browser open source selector engine called Sizzle.
2)Event handling − The jQuery offers an elegant way to capture a wide variety of events, such as a user clicking on a link, without the need to clutter the HTML code itself with event handlers.
3)AJAX Support − The jQuery helps you a lot to develop a responsive and feature-rich site using AJAX technology.
4)Animations − The jQuery comes with plenty of built-in animation effects which you can use in your websites.
5)Lightweight − The jQuery is very lightweight library - about 19KB in size ( Minified and gzipped )
6)Latest Technology − The jQuery supports CSS3 selectors and basic XPath syntax.
How to use jQuery?
There are two ways to use jQuery.
a)Local Installation − You can download jQuery library on your local machine and include it in your HTML code.
b)CDN Based Version − You can include jQuery library into your HTML code directly from Content Delivery Network (CDN).
Local Installation
- Go to the https://jquery.com/download/ to download the latest version available.
- Now put downloaded jquery-2.1.3.min.js file in a directory of your website, e.g. /jquery.
<head>
<script type = "text/javascript" src ="/jquery/jquery-2.1.3.min.js"></script>
<script>
<script type = "text/javascript" src ="/jquery/jquery-2.1.3.min.js"></script>
<script>
$(document).ready(function(){
//code goes here
});
</script>
</head>
CDN Based Version
You can include jQuery library into your HTML code directly from Content Delivery Network (CDN). Google and Microsoft provides content deliver for the latest version.
We are using Google CDN version of the library throughout this<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
//your code goes here
});
</script>
</head>
Calling a jQuery library functions
f you want an event to work on your page, you should call it inside the $(document).ready() function. Everything inside it will load as soon as the DOM is loaded and before the page contents are loaded.
To do this, we register a ready event for the document as follows −
$(document).ready(function(){//your code goes here
});
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