Keyboard action menu

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<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta
      http-equiv="Content-Security-Policy"
      content="default-src 'none'; style-src 'unsafe-inline'; script-src 'unsafe-inline'; img-src data: blob:; connect-src 'none'; form-action 'none'; object-src 'none'; base-uri 'none'"
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    <title>MRHTML | A few useful actions.</title>
    <style>
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      h1 {
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      button,
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      button {
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      button,
      a,
      summary {
        touch-action: manipulation;
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      button:focus-visible,
      a:focus-visible,
      select:focus-visible,
      [tabindex]:focus-visible,
      summary:focus-visible {
        outline: 3px solid #a94823;
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        .brand {
          font-size: 13px;
          gap: 8px;
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        .intro {
          margin-bottom: 26px;
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        .intro > p:last-child {
          font-size: 14px;
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        h1 {
          font-size: 40px;
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        .footer {
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          font-size: 9px;
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      @media (max-width: 350px) {
        h1 {
          font-size: 35px;
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        .button {
          padding: 10px 12px;
          font-size: 12px;
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      @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
          animation: none !important;
          transition: none !important;
          scroll-behavior: auto !important;
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      }

      .project-card {
        max-width: 720px;
        margin-inline: auto;
        overflow: visible;
      }
      .project-top {
        display: flex;
        justify-content: space-between;
        gap: 20px;
        padding: 25px;
      }
      .project-top .small {
        font-size: 9px;
        color: var(--muted);
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      .state {
        display: inline-block;
        margin-top: 9px;
        padding: 3px 9px;
        border: 1px solid #adbda4;
        border-radius: 20px;
        font-size: 10px;
        color: #47613c;
        background: #f0f4eb;
      }
      .menu-wrap {
        position: relative;
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        top: 52px;
        right: 0;
        min-width: 205px;
        padding: 7px;
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        background: #fff;
        color: var(--ink);
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        padding: 12px;
        font-size: 13px;
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      #actions button:focus {
        background: #e8efe5;
        outline: 2px solid #a94823;
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        position: relative;
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        display: flex;
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        padding-left: 38px;
      }
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        font-size: 57px;
        line-height: 0.92;
        letter-spacing: -3px;
        color: #244633;
        z-index: 1;
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        position: absolute;
        width: 280px;
        height: 280px;
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        top: 15px;
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        border-top: 1px solid var(--line);
        margin-top: 22px;
        padding-top: 13px;
      }
      summary {
        cursor: pointer;
        font-size: 13px;
        padding: 9px 0;
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      details p {
        font-size: 13px;
        color: var(--muted);
        margin-top: 9px;
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      .project-card.highlighted {
        outline: 3px solid #966521;
        outline-offset: 5px;
      }
      .action-status {
        margin-top: 25px;
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      .state.ready {
        background: #186354;
        color: #fff;
        border-color: #186354;
      }
      @media (max-width: 500px) {
        .project-top {
          padding: 20px;
          gap: 12px;
        }
        .project-top .small {
          font-size: 7px;
        }
        #menu-button {
          font-size: 11px;
          padding-inline: 12px;
        }
        #actions {
          min-width: 185px;
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        .project-art {
          height: 230px;
          padding-left: 23px;
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        .project-art > span {
          font-size: 49px;
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        .art-line {
          right: -70px;
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        .art-disc {
          right: -3px;
        }
        .project-body {
          padding: 22px;
        }
        .project-body h2 {
          font-size: 30px;
        }
      }
    </style>
  </head>
  <body>
    <header class="header wrap">
      <span class="brand"
        ><span class="mark" aria-hidden="true">m.</span>MRHTML / Workshop</span
      >
      <p>SMALL PATTERNS.<br />CONSIDERED DETAILS.</p>
    </header>
    <main class="wrap">
      <div class="intro">
        <p class="eyebrow">03 / ACTION MENU</p>
        <h1>A few useful actions.</h1>
        <p>
          A compact command menu for a fictional project card. Each action
          updates this local example and explains what changed.
        </p>
      </div>
      <noscript
        ><p>
          The sample card and its project note remain readable. JavaScript
          enables the local action menu.
        </p></noscript
      >
      <article class="surface project-card" id="project-card">
        <div class="project-top">
          <div>
            <span class="small">WORKSHOP / CONCEPT 04</span>
            <p id="project-state" class="state">Draft</p>
          </div>
          <div class="menu-wrap">
            <button
              class="button secondary"
              type="button"
              id="menu-button"
              aria-haspopup="menu"
              aria-expanded="false"
              aria-controls="actions"
              hidden
            >
              Actions <span aria-hidden="true">⌄</span>
            </button>
            <div id="actions" role="menu" aria-labelledby="menu-button" hidden>
              <button
                type="button"
                role="menuitem"
                tabindex="-1"
                data-action="ready"
              >
                Mark as ready</button
              ><button
                type="button"
                role="menuitem"
                tabindex="-1"
                data-action="highlight"
              >
                Toggle highlight</button
              ><button
                type="button"
                role="menuitem"
                tabindex="-1"
                data-action="reset"
              >
                Reset this card
              </button>
            </div>
          </div>
        </div>
        <div class="project-art" aria-hidden="true">
          <div class="art-line"></div>
          <div class="art-disc"></div>
          <span>room<br />for ideas.</span>
        </div>
        <div class="project-body">
          <h2>The idea shelf</h2>
          <p>A place to collect questions before turning them into plans.</p>
          <details>
            <summary id="review-note">Read the project note</summary>
            <p>
              This fictional card demonstrates local actions. “Ready” is a
              visual label, not a submission, approval, or external workflow.
            </p>
          </details>
        </div>
      </article>
      <p
        id="action-status"
        class="status action-status"
        role="status"
        aria-live="polite"
        aria-atomic="true"
      >
        The card is a draft. No changes have been made.
      </p>
      <p class="note">
        Use Arrow keys, Home, and End inside the menu. Escape closes it and
        returns focus. These are commands, not navigation links.
      </p>
    </main>
    <footer class="footer wrap">
      <span>MRHTML / Original runnable example</span
      ><span>Local content. No network required.</span>
    </footer>
    <script>
      (() => {
        'use strict';

        const trigger = document.querySelector('#menu-button'),
          menu = document.querySelector('#actions');
        const items = [...menu.querySelectorAll('[role="menuitem"]')];
        const card = document.querySelector('#project-card'),
          state = document.querySelector('#project-state'),
          status = document.querySelector('#action-status');
        function close(restore = false) {
          menu.hidden = true;
          trigger.setAttribute('aria-expanded', 'false');
          if (restore) trigger.focus();
        }
        function open(index = 0) {
          menu.hidden = false;
          trigger.setAttribute('aria-expanded', 'true');
          items[index].focus();
        }
        trigger.addEventListener('click', () =>
          menu.hidden ? open() : close(true),
        );
        trigger.addEventListener('keydown', (event) => {
          if (event.key === 'ArrowDown' || event.key === 'ArrowUp') {
            event.preventDefault();
            open(event.key === 'ArrowUp' ? items.length - 1 : 0);
          }
        });
        menu.addEventListener('keydown', (event) => {
          const index = items.indexOf(document.activeElement);
          let next;
          if (event.key === 'ArrowDown') next = (index + 1) % items.length;
          if (event.key === 'ArrowUp')
            next = (index - 1 + items.length) % items.length;
          if (event.key === 'Home') next = 0;
          if (event.key === 'End') next = items.length - 1;
          if (next !== undefined) {
            event.preventDefault();
            items[next].focus();
            return;
          }
          if (event.key === 'Escape') {
            event.preventDefault();
            close(true);
          }
          if (event.key === 'Tab') {
            event.preventDefault();
            close();
            (event.shiftKey
              ? trigger
              : document.querySelector('#review-note')
            ).focus();
          }
          if (
            event.key.length === 1 &&
            !event.ctrlKey &&
            !event.metaKey &&
            !event.altKey
          ) {
            const match = items.find((item) =>
              item.textContent
                .trim()
                .toLowerCase()
                .startsWith(event.key.toLowerCase()),
            );
            if (match) {
              event.preventDefault();
              match.focus();
            }
          }
        });
        items.forEach((item) =>
          item.addEventListener('click', () => {
            if (item.dataset.action === 'ready') {
              state.textContent = 'Ready';
              state.classList.add('ready');
              status.textContent =
                'Card marked as ready in this demo only. Nothing was submitted.';
            }
            if (item.dataset.action === 'highlight') {
              const active = card.classList.toggle('highlighted');
              status.textContent = active
                ? 'Highlight added to this card.'
                : 'Highlight removed from this card.';
            }
            if (item.dataset.action === 'reset') {
              state.textContent = 'Draft';
              state.classList.remove('ready');
              card.classList.remove('highlighted');
              status.textContent = 'Card reset to its original draft state.';
            }
            close(true);
          }),
        );
        document.addEventListener('pointerdown', (event) => {
          if (
            !menu.hidden &&
            !menu.contains(event.target) &&
            !trigger.contains(event.target)
          )
            close();
        });
        document.addEventListener('focusin', (event) => {
          if (
            !menu.hidden &&
            !menu.contains(event.target) &&
            event.target !== trigger
          )
            close();
        });
        trigger.hidden = false;
      })();
    </script>
  </body>
</html>