[6.x] Fix Live Preview iframe becoming unscrollable after resizing in Chromium#14542
Merged
jasonvarga merged 1 commit into6.xfrom Apr 23, 2026
Merged
[6.x] Fix Live Preview iframe becoming unscrollable after resizing in Chromium#14542jasonvarga merged 1 commit into6.xfrom
jasonvarga merged 1 commit into6.xfrom
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This pull request fixes an issue where dragging the Live Preview resize handle would leave the preview iframe unscrollable in Chromium-based browsers (Chrome, Edge, Arc, etc.). Safari was unaffected.
This was happening because Chromium doesn't recalculate an iframe's scroll state when its parent container is resized. Small drags within the same CSS breakpoint were especially bad, as nothing else triggered the necessary reflow.
This PR fixes it by toggling a
translateZ(0)transform on the iframe for a single animation frame after the resize ends, which forces Chromium to recalculate the iframe's layout and restore scrollability.Fixes #14540