May 15, 2016 · Whether ECMAScript is the language and JavaScript is a dialect is arguable, but not important. If you continue to think like this it might confuse you. There is no compiler out there that would run ECMAScript, and I believe JavaScript is considered the Language which implements a standard called ECMAScript.

ECMAScript is a standard. JavaScript is an implementation of that standard (edition 3 of that standard to be more exact). Other implementations of ECMAScript are ActionScript and JScript. Also note that there isn't one JavaScript. Each JavaScript engine may implement its own version of the language as long as it meets the ECMAScript requirements.

Jul 24, 2014 · However, a ECMAScript validator will probably tell you it is not valid, because alert() is not part of the ECMAScript, but a typically feature of JavaScript for Browsers. There are many features of JavaScript, which make only sense in a browser environment, f.i. window.navigator, window.document, WebSocket, navigator.geolocation.

Besides ECMAScript common JavaScript implementations usually add more functionality, which might be standardized by other institutions (like the W3C) or might be proprietary (aka "browser-specific") features of the specific implementation. So you could say, that ECMAScript represents a subset of JavaScript.

Aug 21, 2012 · ECMAScript is the name of the language standard developed by ECMA, from the original Javascript implementation. So, it's just one language, with different implementations. The implementations of Javascript and JScript differ somewhat in what they support, but each version supports what's in the corresponding version of the ECMAScript standard.

Sep 14, 2013 · Each Web browser and server that supports ECMAScript supplies its own host environment, completing the ECMAScript execution environment. An ECMAScript implementation must supply a "host environment". In the case of a Web browser, that host environment includes DOM manipulation APIs and other APIs specified by the W3C and WHATWG.

Mar 12, 2018 · IE 8 supports JScript 6 (which is equivalent to ECMAScript 3, JavaScript 1.5 - more bug fixes over JScript 5) Firefox 1.0 supports JavaScript 1.5 (ECMAScript 3 equivalent) Firefox 1.5 supports JavaScript 1.6 (1.5 + Array Extras + E4X + misc.) Firefox 2.0 supports JavaScript 1.7 (1.6 + Generator + Iterators + let + misc.)

Dec 19, 2014 · The ECMAScript wiki lists some possible use cases, like automatically escaping or encoding input, or localization. You could create a tag function named msg that looks up the literal parts like My name is and substitutes them with translations into the current locale's language, for example into German:

Jan 16, 2019 · Finally, the [HTML] specification uses "text/javascript" as the default media type of ECMAScript when preparing script tags; therefore, "text/javascript" intended usage has been moved from OBSOLETE to COMMON.

Apr 8, 2014 · ECMAScript has changed quite a bit since ECMAScript 5.1 gave us the functional Array.forEach, Array.map and all of these functional programming features that have us use functions where for loops would have been used before. Asynchronous JavaScript has taken off quite a bit. ES6 will also ship a Promise object, which means even more anonymous ...