@itwin/itwinui-react/DEV-esm/core/Header/HeaderSplitButton.js

A react component library for iTwinUI

import cx from 'classnames';
import * as React from 'react';
import { DropdownMenu } from '../DropdownMenu/DropdownMenu.js';
import {
  SvgCaretDownSmall,
  SvgCaretUpSmall,
  Box,
  ButtonBase,
} from '../../utils/index.js';
import { HeaderBasicButton } from './HeaderBasicButton.js';
export const HeaderSplitButton = React.forwardRef((props, forwardedRef) => {
  let {
    menuItems,
    className,
    menuPlacement = 'bottom-end',
    children,
    disabled,
    ...rest
  } = props;
  let [isMenuOpen, setIsMenuOpen] = React.useState(false);
  let [menuWidth, setMenuWidth] = React.useState(0);
  let ref = React.useRef(null);
  React.useEffect(() => {
    if (ref.current) setMenuWidth(ref.current.offsetWidth);
  }, [children]);
  return React.createElement(
    Box,
    {
      className: cx('iui-header-breadcrumb-button-wrapper', className),
      ref: ref,
    },
    React.createElement(
      HeaderBasicButton,
      {
        ref: forwardedRef,
        disabled: disabled,
        ...rest,
      },
      children,
    ),
    React.createElement(
      DropdownMenu,
      {
        placement: menuPlacement,
        menuItems: menuItems,
        style: {
          minInlineSize: menuWidth,
        },
        onVisibleChange: (open) => setIsMenuOpen(open),
      },
      React.createElement(
        ButtonBase,
        {
          'aria-label': 'More',
          className:
            'iui-header-breadcrumb-button iui-header-breadcrumb-button-split',
          disabled: disabled,
        },
        isMenuOpen
          ? React.createElement(SvgCaretUpSmall, {
              className: 'iui-header-breadcrumb-button-dropdown-icon',
              'aria-hidden': true,
            })
          : React.createElement(SvgCaretDownSmall, {
              className: 'iui-header-breadcrumb-button-dropdown-icon',
              'aria-hidden': true,
            }),
      ),
    ),
  );
});