javascript-tutorial/archive/menu.html at patch-1 · coder4u/javascript-tutorial · GitHub

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<!DOCTYPE HTML>
<html>

<head>
  <meta charset="utf-8">
  <style>
    .menu ul {
      margin: 0;
      list-style: none;
      padding-left: 20px;
      display: none;
    }

    .menu .title {
      font-size: 18px;
      cursor: pointer;
    }

    .menu .title::before {
      color: green;
      font-size: 80%;
      content: '▶ ';
    }

    .menu_open .title::before {
      color: green;
      font-size: 80%;
      content: '▼ ';
    }

    .menu_open ul {
      display: block;
    }
  </style>
</head>

<body>

  <div id="sweeties" class="menu">
    <span class="title">Сладости (нажми меня)!</span>
    <ul>
      <li>Торт</li>
      <li>Пончик</li>
      <li>Пирожное</li>
    </ul>
  </div>

  <script>
    function Menu(options) {
      var elem = options.elem;

      function toggle() {
        elem.classList.toggle('menu_open');
      }

      elem.onclick = function(event) {
        console.log(event);
        console.log(this == elem);
        toggle();
      }

      this.toggle = toggle;
    }

    var menu = new Menu({
      elem: document.querySelector('#sweeties')
    });

    setInterval(function() {
      menu.toggle();
    }, 3000)
  </script>

</body>

</html>