don't steal focus when embedded in an iframe

[pepijndevos]

📝 Summary

When Marimo is embedded in a larger app inside an iframe, it will steal focus and break keyboard navigation.

🔍 Description of Changes

In some places the code already checks if it's being embedded, but in two other places it unconditionally steals focus, even when embedded in an iframe. This PR simply adds checks to only focus itself when not embedded.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• Tests have been added for the changes made.
• Documentation has been updated where applicable, including docstrings for API changes.
• Pull request title is a good summary of the changes - it will be used in the release notes.

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Project	Deployment	Review	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Jan 13, 2026 2:49pm

[mscolnick]

i don't think we quite want this, especially on molab.

we still want some of these autofocus interactions, regardless if its in an iframe or not. an alternative maybe could be to check that document.hasFocus() is also true, so we don't still focus from outside the iframe

[pepijndevos]

That makes sense and I've confirmed that works for my app

[mscolnick]

looks like some tests are currently failing