/** How long a copy control shows its confirmed state before reverting. */
export declare const COPIED_RESET_MS = 2000;
/** A copy control's confirmed face; whichever face shows is also its accessible name. */
export declare const COPIED_LABEL = "Copied";
export interface ClipboardCopyMessages {
    /** Shown when the browser offers no clipboard at all (any non-secure context). */
    readonly noClipboard: string;
    /** Shown when the write, or producing the value, is offered and refused. */
    readonly writeFailed: (reason: unknown) => string;
}
export interface ClipboardCopy {
    /** Whether the confirmed window is currently open. */
    readonly copied: boolean;
    /** The last failure's message, or `undefined` while the last copy stands. */
    readonly error: string | undefined;
    /** The polite live-region text: the announcement while confirmed, else empty. */
    readonly announcement: string;
    /**
     * Writes the produced text to the clipboard, returning whether it landed. The
     * value is produced lazily so a serialization that throws is reported through
     * {@link ClipboardCopyMessages.writeFailed}, exactly as a refused write is.
     */
    readonly copy: (produce: () => string) => Promise<boolean>;
}
export declare function useClipboardCopy(messages: ClipboardCopyMessages): ClipboardCopy;
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