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JavaScript (/ ˈ dʒ ɑː v ə s k r ɪ p t /), 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.
JavaScript is a high-level programming language that follows the ECMAScript standard. It was originally designed as a scripting language for websites but became widely adopted as a general-purpose programming language, and is currently the most popular programming language in use. [1]
Mar 5, 2024 · JavaScript documentation of core language features (pure ECMAScript, for the most part) includes the following: The JavaScript guide; The JavaScript reference; For more information about JavaScript specifications and related technologies, see JavaScript technologies overview.
Jan 24, 2024 · JavaScript is a lightweight interpreted programming language. The web browser receives the JavaScript code in its original text form and runs the script from that.
Jun 22, 2023 · Where to find JavaScript information. The JavaScript documentation on MDN includes the following: Learn Web Development provides information for beginners and introduces basic concepts of programming and the Internet. JavaScript Guide (this guide) provides an overview about the JavaScript language and its objects.
A JavaScript engine is a software component that executes JavaScript code. The first JavaScript engines were mere interpreters , but all relevant modern engines use just-in-time compilation for improved performance.
JavaScript was initially created as a browser-only language, but it is now used in many other environments as well. Today, JavaScript has a unique position as the most widely-adopted browser language, fully integrated with HTML/CSS. There are many languages that get “transpiled” to JavaScript and provide certain features.
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 .
Nov 15, 2023 · JavaScript is a general-purpose scripting language. The core language specification focuses on pure computational logic. It doesn't deal with any input/output — in fact, without extra runtime-level APIs (most notably console.log()), a JavaScript program's behavior is entirely unobservable.
A JavaScript engine (also known as JavaScript interpreter or JavaScript implementation) is an interpreter that interprets JavaScript source code and executes the script accordingly. The first JavaScript engine was created by Brendan Eich at Netscape, for the Netscape Navigator Web browser.
