examples/docs/src/components/Header/SidebarToggle.tsx


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import type { FunctionalComponent } from 'preact';
import { h, Fragment } from 'preact';
import { useState, useEffect } from 'preact/hooks';

const MenuToggle: FunctionalComponent = () => {
  const [sidebarShown, setSidebarShown] = useState(false);

  useEffect(() => {
    const body = document.getElementsByTagName('body')[0];
    if (sidebarShown) {
      body.classList.add('mobile-sidebar-toggle');
    } else {
      body.classList.remove('mobile-sidebar-toggle');
    }
  }, [sidebarShown]);

  return (
    <button type="button" aria-pressed={sidebarShown ? 'true' : 'false'} id="menu-toggle" onClick={() => setSidebarShown(!sidebarShown)}>
      <svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16" />
      </svg>
      <span className="sr-only">Toggle sidebar</span>
    </button>
  );
};

export default MenuToggle;