Context

When I paste an image from GHCR into the custom image field, I often accidentally copy a leading or trailing space by accident. The GHCR user interface makes this frustratingly easy to do :)

The error handling for these cases is a bit unclear and inconsistent, and sometimes I don't notice my mistake and wonder why I'm seeing an error.

With a trailing space:

With a leading space:

Proposal

Since spaces are invalid in these strings, I'd love to catch them with javascript validation before submitting, with the same user experience I get if I omit the image tag:

Updates and actions

No response