OptionalbuttonMouse button (pointer-click / -down / -up only).
OptionaldeltaHorizontal wheel delta in pixels (scroll kind only; positive = right).
OptionaldeltaVertical wheel delta in pixels (scroll kind only; positive = down).
OptionalkeyThe pressed key (key kind only).
Which input occurred.
OptionalmodifiersModifier keys held during the input (pointer-click / -down / -up and key kinds).
OptionaltextThe pasted clipboard text (text kind only) — inserted into the remote page's focused element.
OptionalxViewport X (pointer + scroll kinds only).
OptionalyViewport Y (pointer + scroll kinds only).
One human-takeover input the surface emits to the channel while the user "drives" the live view. Mirrors the server's
RemoteBrowserHumanInputunion (flattened for transport): pointer moves/clicks/down/up and scrolls carry VIEWPORT coordinates, a scroll also carries wheel deltas, a key carries the pressed key string. Pointer clicks/down/up and keys also carry any heldmodifiers.