What is javascript mainly used for?

Javascript is mainly used for: 1. To make the page have dynamic effects; 2. To verify whether the control values ​​filled in by users on the page comply with the provisions of the program; 3. Use Script to control the display form of form tags and control the display style. wait.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript is an object- and event-driven and secure interpreted scripting language developed by Netscape.

Mainly used for:

1. To make the page have dynamic effect

2. To verify whether the control value filled in by the page user complies with the program regulations

3. Use Script to control the display form of form tags, control the display style, etc.

Extended information:

JavaScript is a scripting language in web pages. Its predecessor was called LiveScript, developed by Netscape. Later, after Sun launched the famous Java language, Netscape and Sun redesigned LiveScript together in 1995 and renamed it JavaScript.

As an independent web script programming language, JavaScript can do many things, but the most mainstream application is to create web page special effects or verify information on the Web. Figures 1 and 2 show the use of JavaScript scripting language to verify user input. If the information entered by the user in the registration information text box does not meet the registration requirements, or the information entered in the "Confirm Password" and "Password" text boxes are different, a corresponding prompt message will pop up.

[Recommended learning: javascript advanced tutorial】

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