ResizeObserver is unavailable; this view was sized once at mount and will not follow its container.

Warnings reference › shared.autosize.no-resize-observer

Identifier

shared.autosize.no-resize-observer

Raised by

Shared across modules

Since

1.52.0

What happened

A module view that sizes itself to its container looked for ResizeObserver on the element's own window and did not find one. It measured once at mount and applied that size; nothing watches the container afterwards, so the view will not re-fit when the window, a split pane or a sidebar changes its box. Everything else about the view works.

The fix

Load a ResizeObserver polyfill before creating the view, or call the view's own refresh()/resize() from your layout code when you change its container.

Reference

Covered in full at the API reference.