The jQuery library contains the following features:
- HTML/DOM manipulation
- CSS manipulation
- HTML event methods
- Effects and animations
Tip: In addition, jQuery has plugins for almost any task out there.
Why Use jQuery?
Many of the biggest companies on the Web use jQuery, such as:
Will jQuery work in all browsers?
The jQuery team knows all about cross-browser issues, and they have written this knowledge into the jQuery library. jQuery will run exactly the same in all major browsers.
Adding jQuery to Your Web Pages
There are several ways to start using jQuery on your web site. You can:
- Download the jQuery library from jQuery.com
- Include jQuery from a CDN, like Google
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)
Both versions can be downloaded from jQuery.com.
<script> tag (notice that the
<script> tag should be inside the
Tip: Place the downloaded file in the same directory as the pages where you wish to use it.
If you don’t want to download and host jQuery yourself, you can include it from a CDN (Content Delivery Network).
Both Google and Microsoft host jQuery.
To use jQuery from Google or Microsoft, use one of the following:
One big advantage of using the hosted jQuery from Google or Microsoft:
Many users already have downloaded jQuery from Google or Microsoft when visiting another site. As a result, it will be loaded from cache when they visit your site, which leads to faster loading time. Also, most CDN’s will make sure that once a user requests a file from it, it will be served from the server closest to them, which also leads to faster loading time.