declare function copyText(text: string): void;
/**
 * Save image to clipboard via javascript.
 *
 * CAVEATS:
 * 1. Typescript have no type definition of navigator.clipboard.write and ClipboardItem yet
 * 2. Compatibility:
 *    - png only, need extra transformation via canvas if image format is jpg
 *    - supported by chrome 76 and safari 13.1
 * 3. Need another request to fetch image
 *
 * references:
 * - https://github.com/Microsoft/TypeScript/issues/26728
 * - https://developer.mozilla.org/zh-CN/docs/Web/API/ClipboardItem
 * - https://github.com/lgarron/clipboard-polyfill
 */
declare function copyImage(base64Image: string): Promise<boolean>;
export declare const Clipboard: Readonly<{
    copyText: typeof copyText;
    copyImage: typeof copyImage;
}>;
export {};