export declare function isDef<T = unknown>(val?: T): val is T;
interface Options {
    target?: HTMLElement;
}
export declare function useCopyToClipboard(initial?: string): {
    clipboardRef: import('vue').Ref<string, string>;
    isSuccessRef: import('vue').Ref<boolean, boolean>;
    copiedRef: import('vue').Ref<boolean, boolean>;
};
export declare function copyTextToClipboard(input: string, { target }?: Options): boolean;
export {};