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This article mainly introduces "how to put the JavaScript code into the web page". In the daily operation, I believe that many people have doubts about how to put the JavaScript code into the web page. The editor consulted all kinds of materials and sorted out a simple and easy-to-use method of operation. I hope it will be helpful for you to answer the doubt of "how to put the JavaScript code into the web page"! Next, please follow the editor to study!

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

JavaScript programs cannot be run independently and can only be executed in a hosting environment. In general, you can put JavaScript code on a web page and run it with the help of a browser environment.

There are two ways to put JavaScript code into a web page:

Method 1: embed the code directly using tags

Embedding JavaScript scripts in HTML pages requires tags, and users can write JavaScript code directly in tags.

The first JavaScript program [xss_clean] ("Hi,JavaScript!")

Method 2: put the JavaScript code into a js file and import the js file using tags

JavaScript programs can be placed not only directly in HTML documents, but also in JavaScript files.

JavaScript files are text files with a .js extension that can be edited using any text editor.

JavaScript files cannot be run independently and need to be imported into a web page and executed through a browser. Use tags to import JavaScript files.

For example, there is a test.js file that contains the following code:

Alert ("Hi,JavaScript!")

Insert a tag within the tag of an HTML file. Define the src property and set the property value to a URL string that points to an external JavaScript file. The code is as follows:

Note:

When using the < script > tag to include an external JavaScript file, the default file type is Javascript. Therefore, regardless of whether the loaded file extension is .js or not, the browser will follow the JavaScript script to parse.

Tags that define src attributes should no longer contain JavaScript code. If the code is embedded, only the external JavaScript file is downloaded and executed, and the embedded code is ignored.

Save the HTML file and preview it in the browser:

At this point, the study on "how to put JavaScript code into the web page" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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