JavaScript - Versions

JavaScript was developed by Brendan Eich in 1995. It was standardized in 1997 by European Computer Manufacturers Association (ECMA) and officially known as ECMAScript. The first version of the language is known as ECMSScript 1 (abbreviated as ES1). The fist three versiosn (ES1, ES2, and ES3) laid the foundation of the language. The fourth version, ES4, was abandoned. The first main revision done in ES5(2009). The second major revised version is ES6 (ECMAScript 2015). After 2015, the versions are named by the year in which it it released.

The latest version of JavaScript is ECMAScript 2023.

JavaScript Versions

In the Below table, we have specified detailed information about each version.

VersionOfficial NameRelease YearFeatures AddedES1ECMAScript 11997First releaseES2ECMAScript 21998Minor changesES3ECMAScript 31999Added regular expressionsAdded do-whileAdded switchAdded try/catchES4ECMAScript 4Never Released.ES5ECMAScript 52009JavaScript strict modeMultiline stringsString.trim()Array methodsObject methodsGetters and settersTrailing commasES6ECMAScript 20152015let and const statementsMap and set objectsArrow functionsFor/of loopSome array methodsSymbolClassesPromisesJavaScript ModulesNew Number methods and propertiesFor/of loopSpread operatorES7ECMAScript 20162016Exponential (**) operatorArray.includes() methodES8ECMAScript 20172017Added Async/awaitAdded Object.entries() methodAdded Object.values() methodAdded Object.getOwnPropertyDescriptor() methodAdded string paddingES9ECMAScript 20182018Rest object propertiesJavaScript shared memoryPromise.finally() methodNew features of the RegExp() objectES10ECMAScript 20192019String trim.start()String trim.end()Array.flat()Revised Array.sort()Revised JSON.stringify() / toString()Object.fromEntries() methodES11ECMAScript 20202020Nullish Coalescing Operator (??)BigInt primitive data typeES12ECMAScript 20212021String.replaceAll() methodPromise.Any() methodES13ECMAScript 20222022The static block inside the classNew class featuresTop-level awaitES14ECMAScript 20232023Array findLast() & findLastIndex()Hashbang GrammerSymbols as WeakMap keys

Since 2016, early update is being released with version named by the year of release. The update release in June 2023 is known as ECMAScript 2023.

Browser Support

All modern browsers fully support the ES1 to ES6. For other versions, you may use Polyfill and write the additional code.

ChromeFirefoxMicrosoft EdgeOperaSafariFirefox AndroidYesYesYesYesYesYes