web - 自定义菜单的方法 menu

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可以使用popover, 但是对于一些遗留项目, jquery 与bootstrap互相结合,有点儿混乱的时候,

我倾向于使用这个:

https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_js_dropdown_hover

1. 增加HTML: 

<div class="dropdown">
  <button class="dropbtn">Dropdown
  <div class="dropdown-content">
    <a href="#">Link 1 </a>
    <a href="#">Link 2 </a>
    <a href="#">Link 3 </a>
  </div>
</div>

2. 增加CSS:  

.dropbtn {
    background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown:hover .dropbtn {
    background-color: #3e8e41;
}

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