/**
 * Returns `true` if the string is empty or contains only blank characters.
 *
 * @example
 * ```typescript
 * isBlank(''); // => true
 * isBlank(' '); // => true
 * isBlank('hello'); // => false
 * isBlank('  hello  '); // => false
 * ```
 */
declare const isBlank: (str: string) => boolean;
export default isBlank;
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