@mui/base/utils/MuiCancellableEvent.d.ts

Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.

export type MuiCancellableEvent = {
    defaultMuiPrevented?: boolean;
};
export type MuiCancellableEventHandler<Event> = (event: Event & MuiCancellableEvent) => void;