Usage no npm install needed!

<script type="module">
  import reachMenuButton from 'https://cdn.skypack.dev/@reach/menu-button';
</script>

README

@reach/menu-button

Docs | Source | WAI-ARIA

An accessible dropdown menu for the common dropdown menu button design pattern.

import {
  Menu,
  MenuList,
  MenuButton,
  MenuItem,
  MenuLink,
} from "@reach/menu-button";
import "@reach/menu-button/styles.css";

function Example() {
  return (
    <Menu>
      <MenuButton>
        Actions <span aria-hidden>▾</span>
      </MenuButton>
      <MenuList>
        <MenuItem onSelect={() => alert("Download")}>Download</MenuItem>
        <MenuItem onSelect={() => alert("Copy")}>Create a Copy</MenuItem>
        <MenuItem onSelect={() => alert("Mark as Draft")}>
          Mark as Draft
        </MenuItem>
        <MenuItem onSelect={() => alert("Delete")}>Delete</MenuItem>
        <MenuLink as="a" href="https://reacttraining.com/workshops/">
          Attend a Workshop
        </MenuLink>
      </MenuList>
    </Menu>
  );
}