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A JavaScript library is a library of pre-written JavaScript code that allows for easier development of JavaScript-based applications, [1] especially for AJAX and other web-centric technologies. [2] They can be included in a website by embedding it directly in the HTML via a script tag.
Boa: A JavaScript engine written in Rust. [28] [29] ScriptEase: an old proprietary engine last updated in 2003. Only notable for its use in the James Webb Space Telescope. [30] LibJS: JavaScript engine of the SerenityOS and Ladybird projects. [31] Initially it was an AST interpreter, but has been upgraded to a bytecode-based one. [32]
CommonJS's specification of how modules should work is widely used today for server-side JavaScript with Node.js. [1] It is also used for browser-side JavaScript, but that code must be packaged with a transpiler since browsers don't support CommonJS. [1]
Since ES 2015, transpiling JavaScript has become very common. Transpilation is a source-to-source compilation in which newer versions of JavaScript are used, and a transpiler rewrites the source code so that it is supported by older browsers. Usually, transpilers transpile down to ES3 to maintain compatibility with all versions of browsers.
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 February 2025. High-level programming language Not to be confused with Java (programming language), Javanese script, or ECMAScript. JavaScript Screenshot of JavaScript source code Paradigm Multi-paradigm: event-driven, functional, imperative, procedural, object-oriented Designed by Brendan Eich of ...
Pages in category "JavaScript programming language family" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes .
JavaScript-based web application frameworks, such as React and Vue, provide extensive capabilities but come with associated trade-offs. These frameworks often extend or enhance features available through native web technologies, such as routing, component-based development, and state management.