Cursor API

English API reference for the cursor family.

This page is the primary owner for the namespaces listed below. Method names, parameter keys, and return fields follow the C++ RegisterApi handlers.

cursor

cursor.isHidden

Public API method. Runtime authority: src/api/CursorApi.cpp:76.

No parameters.

Returns: {"hidden":"..."}

const result = await fb2k.invoke('cursor.isHidden');

cursor.setHidden

Public API method. Runtime authority: src/api/CursorApi.cpp:75.

Parameter	Type	Required	Description
hidden	boolean	Yes	Required.

Returns: {"changed":"...","error":"...","success":true}

const result = await fb2k.invoke('cursor.setHidden', { hidden: /* value */ });

Cursor visibility lifecycle

cursor.setHidden changes the cursor state for the calling WebView host, not for the desktop or another popup. It requires a boolean hidden value and returns changed: false when the requested state was already active. When the state actually changes, the caller receives cursor:hiddenChanged with { hidden }; the event is not broadcast to other windows.

The foo_ui_webview2 host uses Visual Hosting, so CSS cursor: none alone is not a reliable replacement for this API. A theme may use both approaches: CSS for the element-level visual rule and this API for idle-time behavior.

import { fb } from 'foo-webview-sdk/bridge';

await fb.cursor.setHidden(true);
const { hidden } = await fb.cursor.isHidden();
fb.on('cursor:hiddenChanged', ({ hidden: next }) => {
	document.documentElement.classList.toggle('cursor-hidden', next);
});