Why does Angular build create files with 'es5' and 'es2015' but not 'es6' (or no suffix at all)?

Question

I recently downloaded the Angular CLI (@angular/cli 9.0.1). I then proceeded to create a new application so that I could create a new Angular Element, package it up

Answer 1

They are the same thing.

6th Edition - ECMAScript 2015

• 6th Edition ECMAScript -> ES6
• ECMAScript 2015 -> ES2015

Different names for the same thing. Angular has simply chosen to call it es2015.