JavaScriptin keksi Brendan Eich vuonna 1995 ja siitä tuli ECMA-standardi vuonna 1997.
ECMAScript on kielen virallinen nimi.
ECMAScript-versiot on lyhennetty sanoiksi ES1, ES2, ES3, ES5 ja ES6.
Vuodesta 2016 lähtien versiot on nimetty vuosien mukaan (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 (??) |
Tämä opetusohjelma kattaa kaikki JavaScript-versiot:
Alkuperäinen JavaScript ES1 ES2 ES3 (1997-1999)
Ensimmäinen pääversio ES5 (2009)
Toinen versio ES6 (2015)
Vuosittaiset lisäykset (2016, 2017, 2018, 2019, 2020)
ECMAScript 1 - 6 on täysin tuettu kaikissa nykyaikaisissa selaimissa.
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 ei tue ECMAScript 5:tä "käytä tiukkaa".
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 ei tue ECMAScript 2015:tä.
Browser | Version | Date |
---|---|---|
Chrome | 52 | Jul 2016 |
Firefox | 54 | Jun 2017 |
Edge | 14 | Aug 2016 |
Safari | 10.1 | Mar 2017 |
Opera | 39 | Aug 2016 |