In order to use jQuery, a powerful JavaScript library, to simplify the web development process, you first need to download the corresponding file and import it. This article will introduce in detail how to download and import the files required by jQuery, and attach specific code examples.
1. Download the jQuery file
Before using jQuery, you first need to download the corresponding jQuery file. You can download it through the official website https://jquery.com/ and select the appropriate version to download. Usually we will choose the compressed version (minified) file, because this can reduce the file size and improve the web page loading speed.
For example, we downloaded the compressed version of jQuery 3.5.1. After downloading, we got a file named "jquery-3.5.1.min.js".
2. Introduce the jQuery file into the web page
After downloading the jQuery file, you need to introduce it into the web page so that the web page can use jQuery normally. Functionality provided by the library. Use the <script> tag in the <head> tag of the HTML file to introduce the jQuery file. </script>
The following is a simple sample code for introducing jQuery files:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用jQuery的网页</title>
<script src="jquery-3.5.1.min.js"></script>
</head>
<body>
<!-- 这里是网页内容 -->
</body>
</html>In the above code, we use the
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