Added my code, this is the input field enter image description here

 <div
        ref={ref}
        className={classes.part}
        onKeyDown={disabled ? undefined : handleKeyDown}
        onClick={disabled ? undefined : handleClick}
        tabIndex={disabled ? undefined : 0}
    >
        <input
            type='text'
            value={isUndefined(value) ? '--' : pad(value, 2)}
            disabled={disabled}
            className={classnames(classes.partInput, isCalendar ? classes.partCalendar : classes.partTime)}
        />
    </div>