ContextMenu

A context-triggered command menu with keyboard access.

Root supports open/defaultOpen, disabled and closeOnItemCommit. Trigger opens on context.menu or ContextMenu/Shift+F10 and suppresses the native context menu for that handled request; ordinary left click does not open it. Content inherits real Overlay/Focus/Transition navigation, typeahead and controlled dismissal. Right-click and accepted touch/pen holds open at their input point. ContextMenu/Shift+F10 uses the trigger region. The shared host keeps position geometry private and supplies only an opaque input-origin association; no DOM coordinates enter portable props, state or JSON context.

Parts: Root, Trigger, Content, Item.

Draft source. Nested submenus, complete native/GPUI/compiler evidence, consumer/visual acceptance and independent lifecycle admission remain open.

A touch/pen contact must remain held for 600 ms within the host movement tolerance. Movement, release, cancellation, disabled state and disposal cancel a pending hold. Accepted keyboard/long-press input suppresses its duplicate native context menu; an accepted hold also suppresses its compatibility click. Ordinary clicks and scrolling are left to the host. Default placement is bottom/start with no gap.

Controlled open requests remain requests: the native context menu is prevented when the enabled Root accepts delivery, while the owner may keep open=false. A later owner-open uses the latest live input anchor; programmatic openContextMenu uses the trigger fallback. Escape and selection restore the original trigger according to the existing focus policy. Shared source-runtime coverage does not establish compiler/native admission or real-device long-press acceptance.