Introduction to jQuery
May 07, 2021 jQuery
Table of contents
Introduction to jQuery
The jQuery library can be added to a Web page with a simple line of tags.
The basics you need to have
Before you start learning jQuery, you should have a basic understanding of:
- Html
- Css
- Javascript
If you need to learn these subjects first, find these tutorials on our home page.
What is jQuery?
jQuery is a JavaScript library.
jQuery is a lightweight "write less, do more" JavaScript library.
The jQuery library contains the following features:
- HTML element selection
- HTML element operations
- CSS operation
- HTML event function
- JavaScript effects and animations
- HTML DOM traversal and modification
- Ajax
- Utilities
Tip: In addition, Jquery offers a number of plug-ins.
Why use jQuery?
There are a lot of open source JS frameworks on the network today, but jQuery is the most popular JS framework today and offers a lot of extensions.
Many large companies are using jQuery, for example:
- Microsoft
- Ibm
- Netflix
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Does jQuery work for all browsers?
The jQuery community knows that JS has a number of compatibility issues in different browsers, and jQuery is currently compatible with all major browsers, including Internet Explorer 6! |
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The jQuery version is supported
When using jQuery, you should be aware that version jQuery 2 above does not support IE6, 7, 8 browsers. So if you're using IE6, 7, 8 browsers, you'll have to choose to use jQuery 1.9, or you can use conditional annotations to allow only jQuery 1.9 when using IE6, 7,8 browsers.
The comment code is as follows:
<!--[if lt IE 9]>
<script src="jquery-1.9.0.js"></script>
<![endif]-->
<!--[if gte IE 9]><!-->
<script src="jquery-2.0.0.js"></script>
<!--<![endif]-->Replace the jQuery library
If you want to put jQuery inventory on your computer, you can load CDN jQuery core files from Google or Microsoft based on Google and Microsoft's friendliness to jQuery.
Use Google's CDN
Use Microsoft's CDN