Javascript 简明教程
JavaScript - Versions
JavaScript 是 1995 年由 Brendan Eich 开发的。它在 1997 年由欧洲计算机制造商协会 (ECMA) 标准化，并正式称为 ECMAScript。该语言的第一个版本被称为 ECMASScript 1（缩写为 ES1）。前三个版本（ES1、ES2 和 ES3）奠定了该语言的基础。第四版 ES4 被废弃。ES5（2009）中完成了第一次主要修订。第二次重大修订版是 ES6（ECMAScript 2015）。在 2015 年之后，版本以发布年份命名。<br>
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.
JavaScript 的最新版本是 ECMAScript 2023。<br>
The latest version of JavaScript is ECMAScript 2023.
JavaScript Versions
在下表中，我们对每个版本指定了详细信息。<br>
In the Below table, we have specified detailed information about each version.
Version |
Official Name |
Release Year |
Features Added |
ES1 |
ECMAScript 1 |
1997 |
First release |
ES2 |
ECMAScript 2 |
1998 |
Minor changes |
ES3 |
ECMAScript 3 |
1999 |
Added regular expressionsAdded do-whileAdded switchAdded try/catch |
ES4 |
ECMAScript 4 |
Never Released. |
|
ES5 |
ECMAScript 5 |
2009 |
JavaScript strict modeMultiline stringsString.trim()Array methodsObject methodsGetters and settersTrailing commas |
ES6 |
ECMAScript 2015 |
2015 |
let and const statementsMap and set objectsArrow functionsFor/of loopSome array methodsSymbolClassesPromisesJavaScript ModulesNew Number methods and propertiesFor/of loopSpread operator |
ES7 |
ECMAScript 2016 |
2016 |
Exponential (**) operatorArray.includes() method |
ES8 |
ECMAScript 2017 |
2017 |
Added Async/awaitAdded Object.entries() methodAdded Object.values() methodAdded Object.getOwnPropertyDescriptor() methodAdded string padding |
ES9 |
ECMAScript 2018 |
2018 |
Rest object propertiesJavaScript shared memoryPromise.finally() methodNew features of the RegExp() object |
ES10 |
ECMAScript 2019 |
2019 |
String trim.start()String trim.end()Array.flat()Revised Array.sort()Revised JSON.stringify() / toString()Object.fromEntries() method |
ES11 |
ECMAScript 2020 |
2020 |
Nullish Coalescing Operator (??)BigInt primitive data type |
ES12 |
ECMAScript 2021 |
2021 |
String.replaceAll() methodPromise.Any() method |
ES13 |
ECMAScript 2022 |
2022 |
The static block inside the classNew class featuresTop-level await |
ES14 |
ECMAScript 2023 |
2023 |
Array findLast() & findLastIndex()Hashbang GrammerSymbols as WeakMap keys |
从 2016 年起，早期更新会以发布年份命名的版本发布。2023 年 6 月的更新发布被称为 ECMAScript 2023。
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.