What is the function of js?

This article will explain in detail what the role of js is for you. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

The full name of JS is JavaScript, which is a lightweight, interpretive or just-in-time programming language with function priority; it is a high-level scripting language that belongs to the network, mainly used for Web, and is often used to add a variety of dynamic functions to web pages.

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

1. Javascript (JS) is a scripting language that is mainly used for Web. It is used to enhance HTML pages and can usually be embedded in HTML code. JavaScript is an interpretive language. Therefore, it does not need to be compiled. JavaScript renders web pages in an interactive and dynamic manner. This allows the page to react to events, show special effects, accept variable text, validate data, create cookie, detect users' browsers, and so on.

2. HTML pages are suitable for displaying static content, such as simple images or text. However, most pages are rarely static these days. Many pages today have menus, forms, slides and even images that provide user interaction. Javascript is the language used by Web developers to provide this type of interaction. Because JavaScript is suitable for HTML pages, developers need to know about HTML to take full advantage of this scripting language. Although there are other languages available for scripting on Web, it is basically Javascript.

3. There are two ways to use JavaScript in HTML files. The first method involves embedding all JavaScript code in the HTML code, while the second method uses a separate JavaScript file called from the Script element, which is contained by the Script tag. The JavaScript file is identified by the .js extension.

4. Although JavaScript is mainly used to interact with HTML objects, it can also interact with other non-HTML objects, such as browser plug-ins, CSS (cascading style sheets) properties, the current date, or the browser itself. To write JavaScript code, you only need a basic text editor, such as notepad in Windows, Gimp or BBEdit in Linux. Some text editors, such as BBEdit, provide syntax highlighting for JavaScript. This will allow you to easily identify the elements of the JavaScript code.

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