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ES2025.
JavaScript standard. JavaScript was invented by Brendan Eich in 1995 and became an ECMA standard in 1997. The first ECMAScript versions were abbreviated by numbers. (ES1, ES2, ES3, ES5, ES6). From 2016, versions are named by year (ECMAScript 2016, 2017, 2018, ..., 2025). W3Schools Covers all JavaScript Versions !
ECMAScript 1 (1997)
ECMAScript 2 (1998)
ECMAScript 3 (1999)
Error handling (try...catch)
The do...while loop
ECMAScript 5 (2009)
The "use strict" Directive
The Date.now() method String property access [ ]
ECMAScript 6 (2015)