export type BreakpointKey = 'base' | '2xs' | 'xs' | 'sm' | 'md' | 'lg' | 'xl' | '2xl' | '3xl' | '4xl' | '5xl';
/**
 * Composable that tracks the current Tailwind viewport breakpoint.
 * Updates reactively on window resize.
 *
 * @returns {Object} An object containing:
 * - `currentBreakpoint`: The active breakpoint key (e.g., 'base', 'sm', 'md', 'lg'). Returns 'base' when below the smallest breakpoint (320px).
 * - `windowWidth`: The current window width in pixels
 * - `breakpoints`: The list of all breakpoints with their min-width values
 */
export declare function useViewportBreakpoint(): {
    currentBreakpoint: import('vue').Ref<BreakpointKey, BreakpointKey>;
    windowWidth: import('vue').Ref<number, number>;
    breakpoints: {
        key: Exclude<BreakpointKey, "base">;
        min: number;
    }[];
};