Using jQuery in HTML pages requires referencing the jQuery library file. You can download the latest version of the jQuery library file from the official website, or you can use jQuery's CDN (content distribution network). The reference method is as follows:
<!-- 引用最新版的 jQuery 库文件 --> <script src="https://code.jquery.com/jquery.min.js"></script>
This method will download the latest version of the jQuery library file from the jQuery official website server. However, if the server is under maintenance or the network is delayed, it will cause the page to load slowly or fail. Therefore, we can also use jQuery library files provided by other CDNs, such as Baidu CDN, Sina CDN, 360 CDN, etc., and choose the appropriate CDN reference method as needed.
<!-- 使用百度 CDN 引用 jQuery 库文件 --> <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
In addition to using external library files, you can also download the jQuery library file locally, and then reference the local jQuery library file in the HTML page. For example, download the jQuery library file to the js directory of the project, and reference it as follows:
<!-- 引用本地 jQuery 库文件 --> <script src="js/jquery.min.js"></script>
After referencing the jQuery library file, you can use the rich functions provided by jQuery in the HTML page. For example, you can use jQuery's selector to select page elements, operate on elements, or bind events. The following is a simple example, using jQuery's selector to select the element with the ID content and modify its text content to Hello World.
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>jQuery 示例</title> <!-- 引用 jQuery 库文件 --> <script src="https://code.jquery.com/jquery.min.js"></script> </head> <body> <div id="content">Hello jQuery!</div> <script> // 使用 jQuery 选择器选取元素,并修改其文本内容 $('#content').text('Hello World'); </script> </body> </html>
The above is the specific method of using jQuery reference tags. By referencing jQuery library files and using jQuery selectors and other functions, the efficiency and interactivity of page development can be greatly improved.
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