side-notes/sidepanel/sidepanel.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Side Notes</title>
  <link rel="stylesheet" href="sidepanel.css">
</head>
<body>
  <div id="header">
    <div id="page-info">
      <img id="favicon" src="" alt="" width="16" height="16" hidden>
      <span id="page-title">Loading…</span>
    </div>
    <button id="font-decrease" title="Decrease font size" aria-label="Decrease font size">A-</button>
    <button id="font-increase" title="Increase font size" aria-label="Increase font size">A+</button>
    <button id="open-list" title="View all notes" aria-label="View all notes">☰</button>
  </div>

  <textarea id="editor" placeholder="Write your note…" spellcheck="true" autofocus></textarea>

  <div id="find-bar" hidden>
    <input type="search" id="find-input" placeholder="Find in note…">
    <span id="find-count"></span>
    <button id="find-prev" title="Previous match" aria-label="Previous match">▲</button>
    <button id="find-next" title="Next match" aria-label="Next match">▼</button>
    <button id="find-close" title="Close find bar" aria-label="Close find bar">✕</button>
  </div>

  <div id="status">Saved</div>

  <script type="module" src="sidepanel.js"></script>
</body>
</html>