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 standar

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 https://www.chromestatus.com/features/5365692190687232 [2] https://github.com/whatwg/html/pull/443 https://github.com/whatwg/html/pull/443