如何在用户单击选项时隐藏子菜单，但在用户将鼠标悬停在菜单上时仍显示

Question

目前，当我点击子菜单项时，我的子菜单会显示在悬停和隐藏状态。这很棒。问题是，当我将鼠标悬停在顶级菜单上时，单击子菜单项后它不会显示子菜单。

我真的希望子菜单在用户点击子菜单项时隐藏，但如果用户再次悬停在顶级菜单上，我希望它再次显示。有想法该怎么解决这个吗？真的想要一个简单的JS或css解决方案，请不要jquery。

我确实尝试谷歌这一点，但我发现所有人都试图永久隐藏被点击的子菜单项。我还读到innerHTML将删除所有子元素，因此我将项目文本移动到按钮而不是li元素，并将其更改为innerText而不是innerHTML。

function classSelect(profession) {
  document.getElementById('dropDownSelections').style.display = 'none';
  document.getElementById('classMenuHeader').innerText = profession;
}

function toggleMenu() {
  document.getElementById('dropDownSelections').style.display = 'block';
}

.dropDownList {
  z-index: 1000;
  overflow: visible;
  position: absolute;
}
.dropDownList ul {
  text-align: left;
  display: inline;
  margin: 0;
  padding: 15px 4px 17px 0;
  list-style: none;
  -webkit-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
  -moz-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
  overflow: visible;
}
.dropDownList ul li {
  font: bold 12px/18px sans-serif;
  display: inline-block;
  margin-right: -4px;
  position: relative;
  padding: 15px 20px;
  background: #fff;
  cursor: pointer;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  -ms-transition: all 0.2s;
  -o-transition: all 0.2s;
  transition: all 0.2s;
  overflow: visible;
}
.dropDownList ul li:hover {
  background: #555;
  color: #fff;
  overflow: visible;
}
.dropDownList ul li ul {
  padding: 0;
  position: absolute;
  top: 48px;
  left: 0;
  width: 150px;
  -webkit-box-shadow: none;
  -moz-box-shadow: none;
  box-shadow: none;
  display: none;
  overflow: visible;
  text-align: center;
}
.dropDownList ul li ul li {
  background: #555;
  display: block;
  color: #fff;
  text-shadow: 0 -1px 0 #000;
  overflow: visible;
  margin: 0;
  padding: 0;
}
.dropDownList ul li ul li:hover {
  background: #666;
}
.dropDownList ul li:hover ul {
  display: block;
}
.dropDownList a {
  text-decoration: none;
  display: block;
  height: 3em;
  padding-top: 1.5em;
}
.dropdownList input[type="button"] {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: 1em;
  cursor: pointer;
}

<div class="dropDownList">
  <ul>
    <li onmoustover="toggleMenu();"><a href="#" id="classMenuHeader" onclick="return false;">Select Class</a>
      <ul id="dropDownSelections">
        <li onclick="classSelect('item1');">
          <input type="button" value="item1" />
        </li>
        <li onclick="classSelect('item2');">
          <input type="button" value="item2" />
        </li>
        <li onclick="classSelect('item3');">
          <input type="button" value="item3" />
        </li>
        <li onclick="classSelect('item4');">
          <input type="button" value="item4" />
        </li>
        <li onclick="classSelect('item5');">
          <input type="button" value="item5" />
        </li>
        <li onclick="classSelect('item6');">
          <input type="button" value="item6" />
        </li>
        <li onclick="classSelect('item7');">
          <input type="button" value="item7" />
        </li>
        <li onclick="classSelect('item8');">
          <input type="button" value="item8" />
        </li>
      </ul>
    </li>
  </ul>
</div>

Answer 1

抱歉，我有点诅咒你的js和html，但这应该有效

HTML

<div class="dropDownList">
  <ul id="classDropDownList">
      <li><a href="#" id="classMenuHeader">Select Class</a>
      <ul id="dropDownSelections">
        <li onclick="classSelect('item1');">
          <input type="button" value="item1" />
        </li>
        <li onclick="classSelect('item2');">
          <input type="button" value="item2" />
        </li>
        <li onclick="classSelect('item3');">
          <input type="button" value="item3" />
        </li>
        <li onclick="classSelect('item4');">
          <input type="button" value="item4" />
        </li>
        <li onclick="classSelect('item5');">
          <input type="button" value="item5" />
        </li>
        <li onclick="classSelect('item6');">
          <input type="button" value="item6" />
        </li>
        <li onclick="classSelect('item7');">
          <input type="button" value="item7" />
        </li>
        <li onclick="classSelect('item8');">
          <input type="button" value="item8" />
        </li>
      </ul>
    </li>
  </ul>
</div>

的Javascript

document.addEventListener("DOMContentLoaded", function(event) {

    document.getElementById('classDropDownList').onmouseover = function(){
        document.getElementById('dropDownSelections').style.display = 'block';
    }

    document.getElementById('classDropDownList').onmouseout = function(){
        document.getElementById('dropDownSelections').style.display = 'none';
    }

});

function classSelect(profession) {
  document.getElementById('dropDownSelections').style.display = 'none';
  document.getElementById('classMenuHeader').innerText = profession;
}