Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "must javascript code be written in html?". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Javascript code does not have to be written in html, or it can be written in a script file with the extension ".js", and then referenced by the script tag in html, the syntax "".

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.

In html, there are three ways to use javascript code:

Embed JavaScript code in an HTML document

Write JavaScript code in a script file, using script tag references

Embed JavaScript code in an HTML document

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

The first JavaScript program [xss_clean] (": php.cn")

Write JavaScript code in a script file

JavaScript programs can be placed not only directly in HTML documents, but also in JavaScript script files. JavaScript script files are text files with a .js extension that can be edited using any text editor.

Just create a .js file and write js code in the file, for example:

Alert (": php.cn")

Then in HTML, insert a tag. 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.

This is the end of the introduction to "does the javascript code have to be written in html?" Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.