export type Breakpoint = 'phone' | 'compact' | 'medium' | 'full';
export interface BreakpointState {
    readonly band: Breakpoint;
    /** True below 640 — the `phone` band, where a surface has one column to work in. */
    readonly isPhone: boolean;
    /** True below 1024 — too narrow for two panes side by side. */
    readonly isSinglePane: boolean;
}
export declare function useBreakpoint(): BreakpointState;
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