bigcapital/src/components/Forms/InputPrependButton.js

import React, { useMemo } from 'react';
import classNames from 'classnames';
import { Button, Tooltip, Classes } from '@blueprintjs/core';

export default function InputPrependButton({
  buttonProps = {},
  tooltip = false,
  tooltipProps = {},
}) {
  const appendButton = useMemo(() => (
    <Button
      className={classNames('input-prepend__button', Classes.SMALL)}
      {...buttonProps}
    />
  ), [buttonProps]);

  const appendButtonWithTooltip = useMemo(
    () => (<Tooltip {...tooltipProps}>{ appendButton }</Tooltip>),
    [tooltipProps, appendButton],
  );

  return (
    <div class="input-prepend">
      { tooltip ? appendButtonWithTooltip : appendButton }
    </div>
  );
}