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JAVASCRIPT VERSIONS

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JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in
1997.

ECMAScript is the official name of the language.

ECMAScript versions have been abbreviated to ES1, ES2, ES3, ES5, and ES6.

Since 2016, versions are named by year (ECMAScript 2016, 2017, 2018, 2019,
2020).


ECMASCRIPT EDITIONS

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 4Never 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 (??)


This tutorial covers every version of JavaScript:

 * The Original JavaScript ES1 ES2 ES3 (1997-1999)
 * The First Main Revision ES5 (2009)
 * The Second Revision ES6 (2015)
 * Yearly Additions (2016, 2017, 2018, 2019, 2020)

--------------------------------------------------------------------------------


BROWSER SUPPORT

ECMAScript 1 - 6 is fully supported in all modern browsers.

--------------------------------------------------------------------------------


BROWSER SUPPORT FOR ES5 (2009)

Browser Version From Date Chrome23Nov 2012 Firefox21May 2013 IE9*Mar 2011 IE /
Edge10Sep 2012 Safari6Jul 2012 Opera15Jul 2013

* Internet Explorer 9 does not support ECMAScript 5 "use strict".

--------------------------------------------------------------------------------


BROWSER SUPPORT FOR ES6 (2015)

Browser Version Date Chrome51May 2016 Firefox52Mar 2017 Edge14Aug 2016
Safari10Sep 2016 Opera38Jun 2016

Internet Explorer does not support ECMAScript 2015.

--------------------------------------------------------------------------------

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--------------------------------------------------------------------------------


BROWSER SUPPORT FOR ECMASCRIPT 2016

Browser Version Date Chrome52Jul 2016 Firefox54Jun 2017 Edge14Aug 2016
Safari10.1Mar 2017 Opera39Aug 2016


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