@rmwc/menu

Menus

Menus display a list of choices on a transient sheet of material.

• Module @rmwc/menu
• Import styles:
  • Using CSS Loader
    • import '@rmwc/menu/styles';
  • Or include stylesheets
    • '@material/menu/dist/mdc.menu.css'
    • '@material/menu-surface/dist/mdc.menu-surface.css'
    • '@material/ripple/dist/mdc.ripple.css'
    • '@material/list/dist/mdc.list.css'
    • '@rmwc/icon/icon.css'
• MDC Docs: https://material.io/develop/web/components/menus/

Basic Usage

You can compose a menu with the given components, and manually manage the open state. Menu expects MenuItems as children while MenuSurface is a generic container which can have anything as a child.

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <MenuSurfaceAnchor>
      <Menu
        open={open}
        onSelect={(evt) => console.log(evt.detail.index)}
        onClose={(evt) => setOpen(false)}
      >
        <MenuItem>Cookies</MenuItem>
        <MenuItem>Pizza</MenuItem>
        {/** MenuItem is just a ListItem, so you can intermingle other List components */}
        <ListDivider />
        <MenuItem>Icecream</MenuItem>
      </Menu>

      <Button raised onClick={(evt) => setOpen(!open)}>
        Menu
      </Button>
    </MenuSurfaceAnchor>
  );
}

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <MenuSurfaceAnchor>
      <MenuSurface open={open} onClose={(evt) => setOpen(false)}>
        <div style={{ padding: '1rem', width: '8rem' }}>
          Make the content whatever you want.
        </div>
      </MenuSurface>

      <Button raised onClick={(evt) => setOpen(!open)}>
        Menu Surface
      </Button>
    </MenuSurfaceAnchor>
  );
}

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <MenuSurfaceAnchor>
      <MenuSurface open={open} onClose={(evt) => setOpen(false)}>
        <div style={{ padding: '1rem', width: '8rem' }}>Menu</div>
      </MenuSurface>
      {/** The handle can be any component you want */}
      <IconButton icon="menu" onClick={(evt) => setOpen(!open)} />
    </MenuSurfaceAnchor>
  );
}

function Example() {
  const [open, setOpen] = React.useState(false);

  return (
    <MenuSurfaceAnchor>
      <Menu
        open={open}
        onSelect={(evt) => console.log(evt.detail.index)}
        onClose={(evt) => setOpen(false)}
      >
        <MenuItem>Item One</MenuItem>
        <MenuItem disabled>Item Two (disabled)</MenuItem>
        <MenuItem>Item Three</MenuItem>
      </Menu>

      <Button raised onClick={() => setOpen(!open)}>
        Menu
      </Button>
    </MenuSurfaceAnchor>
  );
}

Simplified usage

RMWC provides a convenience SimpleMenu component that takes a handle as a prop, and manages the open state for you.

<SimpleMenu handle={<Button>Simple Menu</Button>}>
  <MenuItem>Cookies</MenuItem>
  <MenuItem>Pizza</MenuItem>
  <MenuItem>Icecream</MenuItem>
</SimpleMenu>

<SimpleMenuSurface handle={<Button>Simple Menu Surface</Button>}>
  <div style={{ padding: '1rem', width: '8rem' }}>
    Make the content whatever you want.
  </div>
</SimpleMenuSurface>

Anchoring

By default, Menus will attempt to automatically position themselves, but this behavior can be overridden by setting the anchorCorner prop.

function Example() {
  const [anchorCorner, setAnchorCorner] =
    React.useState('topLeft');

  return (
    <>
      <MenuSurfaceAnchor>
        <MenuSurface anchorCorner={anchorCorner} open={true}>
          <div style={{ padding: '1rem', width: '8rem' }}>
            anchorCorner: {anchorCorner}
          </div>
        </MenuSurface>
        <Button raised label="Anchored Menu" />
      </MenuSurfaceAnchor>

      <Select
        value={anchorCorner}
        label="anchorCorner"
        onChange={(evt) => setAnchorCorner(evt.currentTarget.value)}
        options={[
          'topLeft',
          'topRight',
          'bottomLeft',
          'bottomRight',
          'topStart',
          'topEnd',
          'bottomStart',
          'bottomEnd'
        ]}
      />
    </>
  );
}

Rendering through Portals

Occasionally, you may find your menu being cut off from being inside a container that is styled to be overflow:hidden. RMWC provides a renderToPortal prop that lets you use React's portal functionality to render the menu dropdown in a different container.

You can specify any element or selector you want, but the simplest method is to pass true and use RMWC's built in Portal component.

  `
  // Somewhere at the top level of your app
  // Render the RMWC Portal
  // You only have to do this once
  import React from 'react';
  import { Portal } from '@rmwc/base';

  export default function App() {
    return (
      <div>
        ...
        <Portal />
      </div>
    )
  }
`

Now you can use the renderToPortal prop. Below is a contrived example of a menu being cut off due to overflow: hidden.

function Example() {
  const [renderToPortal, setRenderToPortal] = React.useState(true);
  const [menuIsOpen, setMenuIsOpen] = React.useState(false);
  const options = ['Cookies', 'Pizza', 'Icecream'];
  return (
    <>
      <div
        style={{
          marginBottom: '10rem',
          height: '3.5rem',
          overflow: 'hidden'
        }}
      >
        <MenuSurfaceAnchor>
          <Button raised onClick={() => setMenuIsOpen(!menuIsOpen)}>
            Open Menu
          </Button>
          <Menu
            open={menuIsOpen}
            onClose={() => setMenuIsOpen(false)}
            renderToPortal={renderToPortal}
          >
            {options.map((o) => (
              <MenuItem key={o}>{o}</MenuItem>
            ))}
          </Menu>
        </MenuSurfaceAnchor>
      </div>
      <Checkbox
        checked={renderToPortal}
        onChange={(evt) => setRenderToPortal(evt.currentTarget.checked)}
        label="renderToPortal"
      />
    </>
  );
}

Menu

A menu component for displaying lists items.

Props

Name	Type	Description
apiRef	undefined | (api: MenuApi | null) => void	Internal api reference for cross component communication.
focusOnOpen	undefined | false | true	Whether or not to focus the first list item on open. Defaults to true.
foundationRef	React.Ref<MDCMenuFoundation>	Advanced: A reference to the MDCFoundation.
onSelect	undefined | (evt: MenuOnSelectEventT) => void	Callback that fires when a Menu item is selected. evt.detail = { index: number; item: HTMLElement; }

MenuItem

This is just the ListItem component exported from the Menu module for convenience. You can use ListItem or SimpleListItem components from the List section as long as you add role="menuitem" and tabIndex="0" to the components for accessibility.

MenuSurface

Props

Name	Type	Description
anchorCorner	AnchorT	Manually position the menu to one of the corners.
apiRef	undefined | (api: MenuSurfaceApi | null) => void	An internal api for cross component communication.
children	React.ReactNode	Children to render.
fixed	undefined | false | true	Make the menu position fixed.
foundationRef	React.Ref<MDCMenuSurfaceFoundation>	Advanced: A reference to the MDCFoundation.
onClose	undefined | (evt: MenuSurfaceOnCloseEventT) => void	Callback for when the menu is closed.
onOpen	undefined | (evt: MenuSurfaceOnOpenEventT) => void	Callback for when the menu is opened.
open	undefined | false | true	Opens the menu.
renderToPortal	PortalPropT	Renders the menu to a portal. Useful for situations where the content might be cutoff by an overflow: hidden container. You can pass "true" to render to the default RMWC portal.

MenuSurfaceAnchor

MenuSurfaceAnchor

SimpleMenu

A Simplified menu component that allows you to pass a handle element and will automatically control the open state and add a MenuSurfaceAnchor

Props

Name	Type	Description
apiRef	undefined | (api: MenuApi | null) => void	Internal api reference for cross component communication.
children	React.ReactNode	Children to render
focusOnOpen	undefined | false | true	Whether or not to focus the first list item on open. Defaults to true.
foundationRef	React.Ref<MDCMenuFoundation>	Advanced: A reference to the MDCFoundation.
handle	ReactElement<any>	An element that will open the menu when clicked
onSelect	undefined | (evt: MenuOnSelectEventT) => void	Callback that fires when a Menu item is selected. evt.detail = { index: number; item: HTMLElement; }
rootProps	Object	By default, props spread to the Menu component. These will spread to the MenuSurfaceAnchor which is useful for things like overall positioning of the anchor.

SimpleMenuSurface

The same as SimpleMenu, but a generic surface.

Props

Name	Type	Description
children	React.ReactNode	Children to render
handle	ReactElement<any>	An element that will open the menu when clicked
rootProps	Object	By default, props spread to the Menu component. These will spread to the MenuSurfaceAnchor which is useful for things like overall positioning of the anchor.