Suggestion: make iframe editor fullscreen background transparent or configurable

Hi Sebastian,

I have been working quite a lot with Squidex custom editors / iframe editors recently. The feature is extremely useful, especially for building reduced and editor-friendly editing experiences on top of Squidex.

While testing expanded and fullscreen editor views, I noticed that the fullscreen wrapper currently has a hard white background:

.fullscreen {
    background: $color-white;
}

For normal cases this is absolutely fine. But for custom iframe editors it slightly limits what the embedded editor can do visually.

Example use case:

A custom editor might want to use fullscreen as a focused editing layer, e.g. for:

  • detail editing
  • confirmation dialogs
  • preview/edit modes
  • modal-like workflows
  • editor-specific backdrops

In these cases it would be very helpful if the Squidex fullscreen wrapper did not enforce a solid white background, but allowed the iframe editor to control the visual surface itself.

Would it be possible to change the fullscreen wrapper background to transparent, or make it configurable?

Something like:

.fullscreen {
    background: transparent;
}

or, if changing the default is too risky, perhaps only for iframe/custom editors.

The embedded editor can still render its own white background if needed, so this would give custom editors more flexibility without necessarily changing the normal behavior much.

This is not a blocker, just a UX/extensibility suggestion. But it could make custom editor views more powerful, especially for editor-friendly workflows where Squidex is used as the underlying CMS and the iframe editor provides a simplified editing interface for content editors.

Best regards
Steven