TIL: Script `type="module"`

Today I learned it’s really important to specify type="module" on your <script tags if you want to use any dynamic import() statements. If you don’t, you’ll likely see some cryptic error like:

TypeError: Failed to resolve module specifier './de-DE.09c74a0d.js'. The base URL is about:blank because import() is called from a CORS-cross-origin script.

That example is what we saw in the wild when it was missing within an iframe.