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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.
JScript was first supported in the Internet Explorer 3.0 browser released in August 1996. Its most recent version is JScript 9.0, included in Internet Explorer 9. JScript 10.0 [5] is a separate dialect, also known as JScript .NET, which adds several new features from the abandoned fourth edition of the ECMAScript standard.
Node.js. Node.js is a cross-platform, open-source JavaScript runtime environment that can run on Windows, Linux, Unix, macOS, and more. Node.js runs on the V8 JavaScript engine, and executes JavaScript code outside a web browser . Node.js lets developers use JavaScript to write command line tools and for server-side scripting.
jQuery is a JavaScript library designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animations, and Ajax. [3] It is free, open-source software using the permissive MIT License. [4] As of August 2022, jQuery is used by 77% of the 10 million most popular websites. [5]
Most modern code editors and IDEs allow you to set up a localhost server – eg. use atom-live-server in Atom, and Live Server in VS Code. WebStorm and PhpStorm have the feature built in, without requiring an extension. You can also use a third party program such as Node.js 's npx http-server command, or XAMPP.
V8 (JavaScript engine) 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]
The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program. The examples below make use of the log function of the console object present in most browsers for standard text output . The JavaScript standard library lacks an official standard text output function (with the exception of document.write ).
Image Credits: Manuel Breva Colmeiro / Getty Images. At its Ignite conference, Microsoft today announced an update to Excel that brings a new JavaScript API to the venerable spreadsheet app. With ...