Should I learn ES6 or ES5?
Yes, a lot of things are still coded in ES5 or older, so it’s better to know it too. If you’re working by yourself, ES6-only is totally fine, but when reading other codes or working in collaboration, you will still see a lot of ES5 or older syntax.
Es6 is def still relevant and not at all outdated. most stuff after it is just in addition to it, so yes, es6 is very good to learn.
Why do we use ECMAScript?
What version of ECMAScript does chrome support?
|ES5||ECMAScript 5 (2009)|