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This article mainly explains "what can JavaScript be used for". Friends who are interested may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what can JavaScript do?"

JavaScript is a client scripting language. JavaScript is a prototype inheritance, object-based, dynamic type, case-sensitive client scripting language, the main purpose is to solve the speed problem left by the server-side language and provide customers with a more smooth browsing effect.

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

JavaScript is a case-sensitive client scripting language based on object dynamic types, which is developed from Netscape's LiveScript. The main purpose is to solve the speed problem left by server-side languages, such as Perl, and to provide customers with smoother browsing effect.

At that time, the server needs to verify the data, because the speed of the network is very slow, only 28.8kbps, the verification step wastes too much time. So NavigaTor, the browser of Netscape, joined Javascript to provide the basic functions of data verification. The role of js is mainly to achieve some special effects that are difficult to achieve by CSS, which are usually used in conjunction with jQuery,Ajax.

JavaScript is a scripting language widely used in client-side Web development, which is often used to add dynamic functions to HTML (a subset of the standard general markup language) web pages, such as responding to various actions of users.

Using JavaScript, you can do:

1. Embed dynamic text into HTML pages.

2. Respond to browser events.

3. Read and write HTML elements.

4. Verify the data before it is submitted to the server.

5. Detect the browser information of visitors. Control cookies, including creation and modification, etc.

6. Server-side programming based on Node.js technology.

How to run JavaScript

As a scripting language, JavaScript code cannot be run independently. Usually, we need a browser to run JavaScript code. All Web browsers support JavaScript.

In addition to being executed in browsers, JavaScript code can also be executed on the server or devices equipped with JavaScript engine. Browsers can run JavaScript code because JavaScript engines are embedded in browsers. Common JavaScript engines are:

JavaScript engine in V8:Chrome and Opera

JavaScript engine in SpiderMonkey:Firefox

JavaScript engine in Chakra:IE

JavaScript engine in ChakraCore:Microsoft Edge

JavaScript engine in SquirrelFish:Safari.

At this point, I believe you have a deeper understanding of "what JavaScript can be used for". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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