import { TimeFormat } from '../types';
/**
 * Checks if a time aligns with a given step interval.
 *
 * @param time - The time to check
 * @param step - The step increment in minutes
 * @returns True if the time aligns with the step
 */
export declare function isTimeOnStep(time: string, step: number): boolean;
/**
 * Checks if a time is valid (exists and can be parsed).
 *
 * @param time - The time to check
 * @returns True if the time is valid
 */
export declare function isValidTime(time: string | null): boolean;
/**
 * Checks if a partial input might become valid as the user continues typing.
 * For example, "1" in a 10-11 AM range could become "10:00 AM" or "11:00 AM".
 * Or "2" in a 20:00-23:00 range could become "20:00", "21:00", etc.
 *
 * @param inputValue - The current input value (may include mask characters)
 * @param format - The time format (12 or 24 hour)
 * @param min - Minimum allowed time constraint
 * @param max - Maximum allowed time constraint
 * @returns True if the partial input could potentially become valid
 */
export declare function isPartialInputPotentiallyValid(inputValue: string, format: TimeFormat, min?: string, max?: string): boolean;