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|Logo=JavaScript-logo.png}}
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'''{{Wplink|JavaScript}}''' (JS), not to be confused with {{Wplink|ECMAScript}} (ES), is a {{Wplink|programming language}} and core technology of {{Wplink|World_Wide_Web|the Web}}, alongside [[wikipedia:HTML|HTML]] and [[wikipedia:CSS|CSS]]. It was created by [[wikipedia:Brendan_Eich|Brendan Eich]] in 1995.<ref>https://exploringjs.com/es5/ch04.html</ref> As of 2025, the overwhelming majority of [[wikipedia:Website|websites]] (98.9%) uses JS for [[wikipedia:Client_(computing)|client]]-side [[wikipedia:Web_page|webpage]] behavior.<ref name="deployedstats">{{cite web |title=Usage Statistics of JavaScript as Client-side Programming Language on Websites |url=https://w3techs.com/technologies/details/cp-javascript |access-date=27 Feb 2024 |website=W3Techs}}</ref> It's even used on the [[wikipedia:Server_(computing)|server]]-side (see [[wikipedia:Node.js|Node.js]]). JS is also known to enhance the [[wikipedia:User_experience|user-experience]] (UX). The [[wikipedia:World_Wide_Web_Consortium|World Wide Web Consortium]] (W3C) provides comprehensive guidelines for such purposes.<ref>https://www.w3.org/wiki/The_principles_of_unobtrusive_JavaScript</ref>
'''{{Wplink|JavaScript}}''' (JS), not to be confused with {{Wplink|ECMAScript}} (ES), is a {{Wplink|programming language}} and core technology of {{Wplink|World_Wide_Web|the Web}}, alongside [[wikipedia:HTML|HTML]] and [[wikipedia:CSS|CSS]]. It was created by [[wikipedia:Brendan_Eich|Brendan Eich]] in 1995.<ref>https://exploringjs.com/es5/ch04.html</ref> As of 2025, the overwhelming majority of [[wikipedia:Website|websites]] (98.9%) uses JS for [[wikipedia:Client_(computing)|client]]-side [[wikipedia:Web_page|webpage]] behavior.<ref name="deployedstats">{{cite web |title=Usage Statistics of JavaScript as Client-side Programming Language on Websites |url=https://w3techs.com/technologies/details/cp-javascript |access-date=27 Feb 2024 |website=W3Techs}}</ref> It's even used on the [[wikipedia:Server_(computing)|server]]-side (see [[wikipedia:Node.js|Node.js]]).
 
JS is also known to enhance the [[wikipedia:User_experience|user-experience]] (UX). The [[wikipedia:World_Wide_Web_Consortium|World Wide Web Consortium]] (W3C) provides comprehensive guidelines for such purposes.<ref>https://www.w3.org/wiki/The_principles_of_unobtrusive_JavaScript</ref>


For the entirety of this article (unless stated otherwise) the terms "JavaScript" and "JS" will be defined as "ECMAScript with access to [https://developer.mozilla.org/en-US/docs/Web/API Web APIs]" or "ES+WebAPI" for short.
For the entirety of this article (unless stated otherwise) the terms "JavaScript" and "JS" will be defined as "ECMAScript with access to [https://developer.mozilla.org/en-US/docs/Web/API Web APIs]" or "ES+WebAPI" for short.