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fix(slot): Render nothing when no outlet is registered - #112568
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Stop rendering slot consumer content in place when no outlet element is available. This avoids the initial flash at the wrong DOM position and prevents remounts caused by switching from inline rendering to a portal once the outlet appears. Co-Authored-By: OpenAI Codex <noreply@openai.com>
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Scope: Frontend
JonasBa
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April 9, 2026 09:13
TkDodo
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Apr 9, 2026
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Render slot consumer content only after an outlet element is available.
Previously the slot consumer rendered its children in place until the outlet mounted, then switched over to a portal. That caused a flash of content at the wrong DOM position and changed the rendered element type under React, which reset component identity across outlet lifecycle changes.
This makes the consumer return
nulluntil the outlet is ready and updates the slot tests to match that behavior.Refs GH-112564