I followed all the step on the custom card creation page Custom card.
I did restart HA and refreshed the browser (Shift + F5).
But the custom card is not available: “Custom element doesn’t exist: content-card-example”.
Does the this example even work at all? Do custom cards work?
Found a report on the same issue here, but no solution was given.
Hmm I just went through the example and it worked for me.
You added the card to your Resources page right?
I added the card to the Resources.
The issue is that HA does not automatically load updates to the custom card. This is very annoying and confusing. I’ve got it working now by applying a version to the resource:
/local/content-card-example.js?v=2
For every edit on the card you have to increase the version number force the changes to be loaded.