JavaScript - Wikipedia JavaScript (JS) [a] is a programming language and core technology of the Web, alongside HTML and CSS Created by Brendan Eich in 1995, [6] it is maintained by Ecma International 's TC39 technical committee, [10] with related Web APIs maintained by W3C and WHATWG [11] As of 2025, JavaScript is the most widely used programming language on GitHub [b][12] Web browsers have a dedicated JavaScript
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