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JavaScript (/ ˈdʒɑːvəskrɪpt /), often abbreviated as JS, is a programming language and core technology of the Web, alongside HTML and CSS. 99% of websites use JavaScript on the client side for webpage behavior. [10] Web browsers have a dedicated JavaScript engine that executes the client code.
JavaScript engines are typically developed by web browser vendors, and every major browser has one. In a browser, the JavaScript engine runs in concert with the rendering engine via the Document Object Model and Web IDL bindings. [ 2 ] However, the use of JavaScript engines is not limited to browsers; for example, the V8 engine is a core ...
V8 is a JavaScript and WebAssembly engine developed by Google for its Chrome browser. [1][4] V8 is free and open-source software that is part of the Chromium project and also used separately in non-browser contexts, notably the Node.js runtime system. [1]
Compiler. License. MIT [3] Website. babeljs.io. Babel is a free and open-source JavaScript transcompiler that is mainly used to convert ECMAScript 2015+ (ES6+) code into backwards-compatible JavaScript code that can be run by older JavaScript engines. It allows web developers to take advantage of the newest features of the language.
JScript. JScript is Microsoft's legacy [2] dialect of the ECMAScript standard [3] that is used in Microsoft 's Internet Explorer web browser. JScript is implemented as an Active Scripting engine. This means that it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages ...
TypeScript may be used to develop JavaScript applications for both client-side and server-side execution (as with Node.js, Deno or Bun). Multiple options are available for transpilation. The default TypeScript Compiler can be used, [7] or the Babel compiler can be invoked to convert TypeScript to JavaScript.
Chakra. Chakra is a proprietary JScript engine developed by Microsoft. It is used in the Internet Explorer web browser. Microsoft later developed a new JavaScript engine for its Microsoft Edge browser, which is confusingly also called Chakra. Microsoft Edge switched to the V8 JavaScript engine in 2020.
JavaScript is the only language that Node.js supports natively, but many compile-to-JS languages are available. [34] As a result, Node.js applications can be written in CoffeeScript, [35] Dart, TypeScript, ClojureScript and others. Node.js is primarily used to build network programs such as web servers. [30]