Re:PR converts the Three.js codebase to ES2015 modules
by maga on Saturday July 23, 2016 @10:48AM
(#12149604)
In development in all browsers[1] meaning none has them yet. IIRC, one of the major roadblocks was the need to define <script type="module"> in the HTML standard[2] as well as the whole loading routine. Hence, the feature is coming later than the rest in ES2015.
[1] https://www.chromestatus.com/features/5365692190687232
[2] https://github.com/whatwg/html/pull/443