That's awesome, just saw that myself! This is a super cool project.
Fwiw with "Google Maps compatible" I didn't mean showing Google's Maps, I was thinking more a drop-in replacement to (some subset of) Google's client library.
Fwiw with "Google Maps compatible" I didn't mean showing Google's Maps, I was thinking more a drop-in replacement to (some subset of) Google's client library.
Most open source efforts have consolidated around MapLibre GL https://maplibre.org which is a maintained fork of Mapbox GL before their switch to a source-available license.
Then just stub out any other API call with "alert('Not implemented, but PR's welcome!')"
And as far as webmasters are concerned, switching from google maps to your maps involves just switching out the <script> tag for a different one.