JavaScript 是由 Brendan Eich 于 1995 年发明的, 成为 ECMA 标准 1997年。
ECMAScript 是该语言的正式名称。
ECMAScript 版本已缩写为 ES1、ES2、ES3、ES5 和 ES6。
自 2016 年起,版本按年份命名(ECMAScript 2016、2017、2018、2019、2020)。
Ver | Official Name | Description |
---|---|---|
ES1 | ECMAScript 1 (1997) | First edition |
ES2 | ECMAScript 2 (1998) | Editorial changes |
ES3 | ECMAScript 3 (1999) | Added regular expressions Added try/catch Added switch Added do-while |
ES4 | ECMAScript 4 | Never released |
ES5 | ECMAScript 5 (2009) Read More |
Added "strict mode" Added JSON support Added String.trim() Added Array.isArray() Added Array iteration methods Allows trailing commas for object literals |
ES6 | ECMAScript 2015 Read More |
Added let and const Added default parameter values Added Array.find() Added Array.findIndex() |
ECMAScript 2016 Read More |
Added exponential operator (**) Added Array.includes() |
|
ECMAScript 2017 Read More | Added string padding Added Object.entries() Added Object.values() Added async functions Added shared memory Allows trailing commas for function parameters |
|
ECMAScript 2018 Read More |
Added rest / spread properties Added asynchronous iteration Added Promise.finally() Additions to RegExp |
|
ECMAScript 2019 Read More |
String.trimStart() String.trimEnd() Array.flat() Object.fromEntries Optional catch binding |
|
ECMAScript 2020 Read More |
The Nullish Coalescing Operator (??) |
本教程涵盖了 JavaScript 的每个版本:
最初的 JavaScript ES1 ES2 ES3 (1997-1999)
ES5 第一次主要修订 (2009)
第二次修订版 ES6 (2015)
每年新增(2016、2017、2018、2019、2020)
所有现代浏览器都完全支持 ECMAScript 1 - 6。
Browser | Version | From Date |
---|---|---|
Chrome | 23 | Nov 2012 |
Firefox | 21 | May 2013 |
IE | 9* | Mar 2011 |
IE / Edge | 10 | Sep 2012 |
Safari | 6 | Jul 2012 |
Opera | 15 | Jul 2013 |
* Internet Explorer 9 不支持 ECMAScript 5“严格使用”。
Browser | Version | Date |
---|---|---|
Chrome | 51 | May 2016 |
Firefox | 52 | Mar 2017 |
Edge | 14 | Aug 2016 |
Safari | 10 | Sep 2016 |
Opera | 38 | Jun 2016 |
Internet Explorer 不支持 ECMAScript 2015。
Browser | Version | Date |
---|---|---|
Chrome | 52 | Jul 2016 |
Firefox | 54 | Jun 2017 |
Edge | 14 | Aug 2016 |
Safari | 10.1 | Mar 2017 |
Opera | 39 | Aug 2016 |