This is awesome.
This allows to improve my load times after each deploy by several factors.
Be aware that the example that is provided in the article is quite dangerous. If for any reason the content of the script is altered, the user will execute it anyway.
With normal scripts you have the integrity="sha-..." option that secures the content. With importmaps we only have a couple of github issues and no solution.
https://developer.mozilla.org/en-US/docs/Web/Security/Subres... https://github.com/WICG/import-maps/issues/221 https://github.com/WICG/import-maps/issues/223