JavaScript: Difference between revisions

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'''JavaScript''' (sometimes abbreviated '''JS''') is a [[prototype-based]] [[scripting language]] that is [[dynamic language|dynamic]], [[weak typing|weakly typed]] and has [[first-class functions]]. It is a [[multi-paradigm]] language, supporting [[Object-oriented programming|object-oriented]],<ref name="ECMA-262">{{cite web|url=http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf | title= ECMAScript Language Specification }}</ref> [[imperative programming|imperative]], and [[functional programming|functional]]<ref name="jsfunc">{{cite video |people= [[Douglas Crockford]] |date= |title= Douglas Crockford on Functional JavaScript |url= http://www.blinkx.com/video/douglas-crockford-on-functional-javascript/xscZz8XhfuNQ_aaVuyUB2A |format= flv |medium= Tech talk |publisher=[[blinkx]] |time= 2:49 |quote=[JavaScript] is also coincidentally the world's most popular functional programming language. JavaScript is and has always been, at least since [version] 1.2, a functional programming language.}}</ref><ref>[http://www.crockford.com/javascript/little.html The Little JavaScripter] shows the relationship with Scheme in more detail.</ref> programming styles.

JavaScript iswas anformalized implementation ofin the [[ECMAScript]] language standard, and is primarily used in the form of [[client-side JavaScript]], implemented as part of a [[Web browser]] in order to give enhanced [[user interface]]s and dynamic [[website]]s. This enables [[Computer programming|programmatic]] access to computational objects within a host environment.

JavaScript's use in [[Application software|applications]] outside Web pages&nbsp;— for example in [[Portable Document Format|PDF]] documents, [[site-specific browser]]s, and [[desktop widget]]s&nbsp;— is also significant. Newer and faster JavaScript [[Virtual machine|VMs]] and frameworks built upon them (notably [[Node.js]]) have also increased the popularity of JavaScript for server-side web applications.