layout: compact: {value} is not a compaction mode; expected {modes}. Falling back to "vertical".

Warnings reference › layout.compact.unknown

Identifier

layout.compact.unknown

Raised by

Layout

Since

1.59.0

What happened

The layout's compact setting was not one of the three modes. Compaction decides how windows close the gaps left by a move or a close, so an unreadable value cannot be guessed at; the layout uses "vertical", its default. A value that is not a string is described by its type rather than printed, because printing it would risk a throw inside the warning itself.

The fix

Set compact to 'vertical', 'horizontal' or 'none'.

The smallest fix

createLayout(el, { compact: 'horizontal', windows: [ … ] });

Reference

Covered in full at the API reference.