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Frame block

This guide exercises the closed-dialect :::frame media frame end-to-end.

Architecture diagram W4B3_FRAME_IMAGE_CANARY
Architecture diagram W4B3_FRAME_IMAGE_CANARY
Architecture overview — W4B3_FRAME_CAPTION_CANARY
W4B3_FRAME_VIDEO_CANARY
Freehand sketch

Invalid extra attrs stay inert rather than rendering a frame shell: W4B3_FRAME_INVALID_CANARY.

The exact-one media invariant also rejects prose children: W4B3_FRAME_STRUCTURE_INVALID_CANARY.

Shared prose after the frames remains on every surface: W4B3_FRAME_SHARED_PROSE.

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Try-It is disabled for this portal. Copy the request from the console above to run it yourself.