What is ES6 with regards to Android 4.4 & below OS?

Question

Some apps made from html do not work unless u have ES6 in Android OS.

Answer 1

I just googled for curiosity cause I didn't have any clue.
looks like the next version of Java Script with new features. at the moment is not fully compatible with all browsers, especially mobile ones, but this is about to change as ECMAScript 6 (ES6) is meant for features to be used in the long term.