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Qué (quién) es JavaScript - definición

HIGH-LEVEL PROGRAMMING LANGUAGE

Javascript; Javascript programming language; JavaScript language; JavaScript programming language; Java script; CSJS; Server-side JavaScript; Client-side JavaScript; SSJS; DOM scripting; JavaScript rollover; Server-Side JavaScript; Javascript Console; JavaScript Forums; .js; Javascript debugger; Javascript 1.7; Server side javascript; Javascript (programming language); Java Script; Escript; JavaScript 1.6; JavaScript 1.7; Live-script; Live-Script; JavaScripts; JavaScript (programming language); Online JavaScript IDE; Mocha (programming language); Online Javascript IDE; JS online IDE; Online JS IDE; Criticism of JavaScript; JavaScript Jabber; History of JavaScript; Functional programming in JavaScript; Vanilla JavaScript; Vanilla JS; Ownership of the JavaScript trademark; JavaScript trademark; JavaScript security vulnerabilities; Security vulnerabilities in JavaScript; JavaScript vulnerabilities; Features of JavaScript

JavaScript

<language> (Formerly "LiveScript") Netscape's simple, cross-platform, World-Wide Web scripting language, only very vaguely related to Java (which is a Sun trademark). JavaScript is intimately tied to the World-Wide Web, and currently runs in only three environments - as a server-side scripting language, as an embedded language in server-parsed HTML, and as an embedded language run in web browsers where it is the most important part of DHTML. JavaScript has a simplified C-like syntax and is tightly integrated with the browser Document Object Model. It is useful for implementing enhanced forms, simple web database front-ends, and navigation enhancements. It is unusual in that the scope of variables extends throughout the function in which they are declared rather than the smallest enclosing block as in C. JavaScript originated from Netscape and, for a time, only their products supported it. Microsoft now supports a work-alike which they call JScript. The resulting inconsistencies make it difficult to write JavaScript that behaves the same in all browsers. This could be attributed to the slow progress of JavaScript through the standards bodies. JavaScript runs "100x" slower than C, as it is purely interpreted (Java runs "10x" slower than C code). Netscape and allies say JavaScript is an "open standard" in an effort to keep Microsoft from monopolising web software as they have desktop software. Netscape and Sun have co-operated to enable Java and JavaScript to exchange messages and data. See also VBScript. Usenet newsgroup: news:comp.lang.javascript. Mailing List: <majordomo@obscure.org> ("subscribe javascript" in body). (2003-04-28)

Escript

·noun A Writing.

JavaScript engine

IMPLEMENTATION OF JAVASCRIPT

ECMAScript engine; JavaScript engines; JavaScript Engine; JS engine

A JavaScript engine is a software component that executes JavaScript code. The first JavaScript engines were mere interpreters, but all relevant modern engines use just-in-time compilation for improved performance.

https://en.wikipedia.org/wiki/JavaScript_engine

Wikipedia

JavaScript

JavaScript (), often abbreviated as JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of websites use JavaScript on the client side for webpage behavior, often incorporating third-party libraries. All major web browsers have a dedicated JavaScript engine to execute the code on users' devices.

JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard. It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM).

The ECMAScript standard does not include any input/output (I/O), such as networking, storage, or graphics facilities. In practice, the web browser or other runtime system provides JavaScript APIs for I/O.

JavaScript engines were originally used only in web browsers, but are now core components of some servers and a variety of applications. The most popular runtime system for this usage is Node.js.

Although Java and JavaScript are similar in name, syntax, and respective standard libraries, the two languages are distinct and differ greatly in design.

https://en.wikipedia.org/wiki/JavaScript

Ejemplos de uso de JavaScript

1. Javascript and Flash plug–in required Either the Flash plugin was not detected on your computer or the JavaScript features of your brower have been disabled.

2. Javascript and Flash plug–in required To view the advanced features of this page you need to have a Javascript enabled browser and the Macromedia Flash plugin installed on your system.

3. Web widgets often consist of DHTML, JavaScript or Adobe Flash mini–programs.

4. JavaScript is necessary for certain site features (most importantly the ability to zoom and move around the artworks), but if you‘re finding progress too slow for your taste, you might consider disabling JavaScript until you need it.

5. To enable Javascript on your browser we recommend that you contact your computer support line.