js equals JavaScript, here is the explanation: JavaScript is a literal scripting language, a dynamically typed, weakly typed, prototype-based language with built-in support for types.

Its interpreter is called the JavaScript engine, which is part of the browser and is widely used in client-side scripting languages. It was first used on HTML (an application under Standard Universal Markup Language) web pages to add dynamic functions to HTML web pages.

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In 1995, it was first designed and implemented on the Netscape Navigator browser by Brendan Eich of Netscape.

Because Netscape was working with Sun, Netscape management wanted it to look like Java, hence the name JavaScript.

But in fact its grammatical style is closer to Self and Scheme.

In order to gain technical advantages, Microsoft launched JScript, and CEnvi launched ScriptEase, which can also run on the browser like JavaScript.

In order to unify specifications, JavaScript is also called ECMAScript because it is compatible with the ECMA standard.

Foreign name: JavaScript Release date: 1992 Designer: Brendan Eich Implementer: Netscape, Mozilla Foundation Programming paradigm: scripting language, prototype-based object-oriented morphological system: dynamic type Origin: United States Part of ECMAScript, which describes the

JavaScript consists of the syntax and basic objects of the language.

Document Object Model (DOM) describes methods and interfaces for processing web content.

Browser Object Model (BOM), describes the methods and interfaces for interacting with the browser.

Basic features JavaScript is a scripting language for the Internet. It has been widely used in Web application development. It is often used to add various dynamic functions to web pages and provide users with smoother and more beautiful browsing effects.

Usually JavaScript scripts realize their functions by embedding them in HTML.

It is an interpreted scripting language (the code is not precompiled).

It is mainly used to add interactive behaviors to HTML (an application under Standard Universal Markup Language) pages.

It can be directly embedded into HTML pages, but writing it as a separate js file facilitates the separation of structure and behavior.

Cross-platform feature, with the support of most browsers, it can run on multiple platforms (such as Windows, Linux, Mac, Android, iOS, etc.).

The Javascript scripting language, like other languages, has its own basic data types, expressions and arithmetic operators, and the basic program framework of the program.

Javascript provides four basic data types and two special data types for processing data and text.

Variables provide a place to store information, and expressions can complete more complex information processing.

Daily use to embed dynamic text in HTML pages.

Respond to browser events.

Read and write HTML elements.

Validate data before it is submitted to the server.

Detect visitor's browser information.

Control cookies, including creation and modification.

Server-side programming based on Node.js technology.

History It was originally designed by Brendan Eich of Netscape.

JavaScript is a registered trademark of Oracle Corporation.

Ecma International developed the ECMAScript standard based on JavaScript.

JavaScript can also be used in other situations, such as server-side programming.

The complete JavaScript implementation consists of three parts: ECMAScript, Document Object Model, and Browser Object Model.

Netscape originally named its scripting language LiveScript, but later Netscape changed its name to JavaScript after cooperating with Sun.

JavaScript was originally inspired by Java and was designed. One of the purposes is to "look like Java", so there are similarities in syntax, and some names and naming conventions are also borrowed from Java.

But the main design principles of JavaScript are derived from Self and Scheme.

The similarity in names between JavaScript and Java was the result of Netscape reaching an agreement with Sun Microsystems for marketing reasons at the time.

In order to gain a technical advantage, Microsoft launched JScript to compete with the JavaScript scripting language.