1832939 - ResizeObserver doesn't fire when element fills more than one column

Status: NEW

(Core :: Layout, defect)

Description

[johnfactotum1]

Attachment: testcase.html

Steps to reproduce:

Use ResizeObserver to observe an element in a container with column-fill: auto. See the attached test case.

Actual results:

The observer works when the element is contained in a single column. But as the element grows, as soon as it flows to another column, the observer stops working.

Expected results:

The resize observer should always work. In the attached test case, the container's style should change whenever there is a resize.