Package Exports

@rmwc/menu
@rmwc/menu/README.md
@rmwc/menu/styles

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Readme

Menus

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

Module @rmwc/menu
Import styles:
- Using CSS Loader
  - import '@rmwc/menu/dist/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>
  );
}

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