No more javascript errors!
Just... copy/paste suggested html code
and we take care of javascript.
We do offer some non-free maps. For those you need to sign up on the service that's hosting them.
But, our code will always stay free.
https://kolo.it/v0.0.1/map.js
contains:
https://unpkg.com/leaflet@1.9.4/dist/leaflet.js
to be more precise.