export type PercentageInputOptions = {
    /**
     * Maximum number of digits allowed after the decimal point. Anything
     * beyond this is silently truncated as the user types. Defaults to 2.
     */
    decimalPlaces?: number;
};
/**
 * Sanitise a percentage-input string as the user types.
 *
 * Designed for use inside a descriptor's `getOnChange`. Rules:
 *
 * - Allows digits and a single decimal point; everything else is dropped.
 * - Caps the integer side at 100. Any 3+ digit value starting with `100`
 *   clamps to `'100'` and drops the fractional part. Other 3+ digit values
 *   truncate to their first two digits (preserves the "can't exceed 99"
 *   behaviour you'd expect from a percentage input).
 * - Caps the fractional side at `decimalPlaces` digits (default 2).
 * - Collapses leading zeros on the integer part (`'07'` → `'7'`) but
 *   preserves a lone `'0'` so the user can type `'0'` or `'0.5'`.
 * - Normalises a leading dot (`'.5'` → `'0.5'`).
 * - Preserves a trailing dot (`'5.'`) so the user can keep typing.
 * - Returns `''` for empty input.
 *
 * @example
 *   percentageInput('33.333')                      // '33.33'
 *   percentageInput('33.333', { decimalPlaces: 3 }) // '33.333'
 *   percentageInput('100.5')                       // '100'
 *   percentageInput('.5')                          // '0.5'
 *   percentageInput('5a.2b')                       // '5.2'
 */
export declare const percentageInput: (value: string, options?: PercentageInputOptions) => string;