The History of JavaScript: Evolution and Milestones
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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. From 2015 ECMAScript is named by year (ECMAScript 2015).
| Version | Official Name | Description |
|---|---|---|
| 1 | ECMAScript 1 (1997) | First Edition. |
| 2 | ECMAScript 2 (1998) | Editorial changes only. |
| 3 | ECMAScript 3 (1999) | Added Regular Expressions. Added try/catch. |
| 4 | ECMAScript 4 | Never released. |
| 5 | ECMAScript 5 (2009) |
Added "strict mode". Added JSON support. Added String.trim(). Added Array.isArray(). Added Array Iteration Methods. |
| 5.1 | ECMAScript 5.1 (2011) | Editorial changes. |
| 6 | ECMAScript 2015 |
Added let and const. Added default parameter values. Added Array.find(). Added Array.findIndex(). |
| 7 | ECMAScript 2016 | Added exponential operator (**). Added Array.prototype.includes. |
| 8 | ECMAScript 2017 | Added string padding. Added new Object properties. Added Async functions. Added Shared Memory. |
| 9 | ECMAScript 2018 | Added rest / spread properties. Added Asynchronous iteration. Added Promise.finally(). Additions to RegExp. |
ECMAScript is often abbreviated to ES.