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 new versions are named by year (ECMAScript 2016 / 2017 / 2018).
ECMAScript Editions
Allows trailing commas for function parameters| 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) |
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 |
Added let and const Added default parameter values Added Array.find() Added Array.findIndex() |
| ECMAScript 2016 |
Added exponential operator (**) Added Array.includes() |
|
| ECMAScript 2017 |
Added string padding Added Object.entries() Added Object.values() Added async functions Added shared memory |
|
| ECMAScript 2018 |
Added rest / spread properties Added asynchronous iteration Added Promise.finally() Additions to RegExp |
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)
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