Must master: Correct use of jQuery files-JS Tutorial-php.cn

Must master: Correct use of jQuery files

WBOY

Release： 2024-02-25 15:15:27

Original

1223 people have browsed it

Must master: Correct use of jQuery files

Essentials for learning jQuery: To correctly introduce jQuery files, the specific code examples required are as follows:

jQuery is a very popular JavaScript library and is widely used in Web development It has powerful functions such as operating DOM, event processing, and animation effects. Correctly introducing jQuery files is the first step in learning and using jQuery. This article will introduce how to correctly introduce jQuery files, and attach specific code examples.

First, we need to download the jQuery file. The jQuery official website (https://jquery.com/) provides a download link for the latest version of jQuery. We can choose to download the compressed version (minified) or the uncompressed version. In general, it is recommended to use the compressed version because its file size is smaller and the page loads faster.

Next, we introduce the jQuery file into the HTML file. Normally, we would place jQuery files in a folder called "js" in the root directory of the project. In the HTML file, we introduce the jQuery file through the following code:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>引入jQuery文件示例</title>
    <script src="js/jquery.min.js"></script>
</head>
<body>
    <h1>Hello, jQuery!</h1>
    <script>
        // 这里可以编写使用jQuery的JavaScript代码
        $(document).ready(function(){
            $("h1").css("color", "red");
        });
    </script>
</body>
</html>

Copy after login

In the above code, we pass <script src="js/jquery.min.js">< /script></script>Introduces jQuery files. In the <script></script> tag, we can write JavaScript code using jQuery. In this example, we use jQuery's $(document).ready() method to ensure that the JavaScript code is executed after the page is loaded, and then pass $("h1").css( "color", "red") to change the text color of the <h1></h1> tag to red.

It should be noted that when introducing the jQuery file, ensure that the imported path is correct and place the jQuery file in the correct location. In addition, it is recommended to always use the Console panel in the developer tools to check whether there are any error messages introducing jQuery files. This helps problems be discovered and fixed in a timely manner.

In short, correctly introducing jQuery files is the basis for learning and using jQuery. I hope the above code examples can help everyone better understand how to introduce jQuery files and start learning the use of jQuery smoothly.

The above is the detailed content of Must master: Correct use of jQuery files. For more information, please follow other related articles on the PHP Chinese website!