Testing double-fetching of
nomodule JS code (including the Safari hack)
<script type="module" src="module.js"></script> <script nomodule src="nomodule.js"></script>
TL;DR: as of April 2020 life's almost good. It should be perfect by the end of 2020 when Safari 14.0 ships and Chromium-Edge 80+ rollout finishes and Edge-Spartan dies.