AnimatedBackground
The decorative backdrop behind the surfaces that have no chrome of their own — sign-in, the splash screen, the assistant. pixel, the default, sweeps a canvas dot grid; blur drifts a mesh gradient. Children sit centred above it. It is aria-hidden and lets the pointer through, with one exception: the pixel variant’s game, which takes pointer events for as long as it is running.
Usage
Examples
Pixel with card
A card above the grid, with excludeCardSize keeping the dots clear behind it. This story also switches on game — the easter egg, and the one case where the backdrop accepts clicks.
Blur
variant='blur': colour blobs drifting behind a frosted layer, which is the assistant’s backdrop rather than the console’s.
Blur with card
The same gradient with content over it. There is no exclusion to set here, since the blur has no grid for a card to interrupt.