fix(resizable): fix "Panel constraints not found" error on initial render#20
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bob-obringer merged 1 commit intomainfrom Jan 21, 2026
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…nder The error occurred when using `collapsed` prop because we tried to call `collapse()` before the panel group had computed its constraints. Changes: - Use `setTimeout(0)` instead of `requestAnimationFrame` to ensure we're after the panel group's layout effects - Add try-catch with retry logic for race conditions - Skip animation on first sync (initial collapsed state) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Fixes the "Panel constraints not found for Panel r_l" error that occurred when using the
collapsedprop onResizablePanelduring initial render.Root Cause
The error occurred because
panelRef.current?.collapse()was called before the panel group had computed its constraints. The previousrequestAnimationFrametiming wasn't sufficient.Changes
setTimeout(0)instead ofrequestAnimationFrame- Ensures we're after the panel group's layout effectsTest plan
<ResizablePanel collapsed={true} collapsible>on initial render - no errorcollapsedprop after mount - panel collapses/expands correctlyanimatedprop - subsequent toggles animate smoothlyyarn build)🤖 Generated with Claude Code