<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> JavaScript (/ ˈdʒɑːvəˌskrɪpt /), often abbreviated as JS, is a high - level, dynamic, weakly typed, object - based, multi-paradigm, and interpreted programming language . Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production . It is used to make webpages interactive and provide online programs, including video games . The majority of websites employ it, and all modern web browsers support it without the need for plug - ins by means of a built - in JavaScript engine . Each of the many JavaScript engines represent a different implementation of JavaScript, all based on the ECMAScript specification, with some engines not supporting the spectrum fully, and with many engines supporting additional features beyond ECMA . </P> <P> As a multi-paradigm language, JavaScript supports event - driven, functional, and imperative (including object - oriented and prototype - based) programming styles . It has an API for working with text, arrays, dates, regular expressions, and basic manipulation of the DOM, but does not include any I / O, such as networking, storage, or graphics facilities, relying for these upon the host environment in which it is embedded . </P> <P> Initially only implemented client - side in web browsers, JavaScript engines are now embedded in many other types of host software, including server - side in web servers and databases, and in non-web programs such as word processors and PDF software, and in runtime environments that make JavaScript available for writing mobile and desktop applications, including desktop widgets . </P>

What is the main use of java script
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