10.1 and iOS Safari 10.3
The nomodule polyfill needs to be loaded prior to any script and be
outside of webpack compilation because otherwise webpack will cause the
script to be wrapped in `window["webpackJsonp"]` which causes it to
fail.
This polyfill will only be injected when the either Safari 10.1 or iOS
Safari 10.3 support is required, which is based on the browsers defined in browserslist file.
Fixes#14680
1dd399c4d2