javascript - Bootstrap Button Drop Down 在 div 上方弹出

Question

我希望列表下拉到按钮下方，但我的下拉列表并非一直位于按钮下方，而是在它现在出现的第一个 div 上。

HTML

    <div class="categories row" id = "secondDiv">
      <div class = "col-md-4 header text-center"> 
        <p id = "columnOne"> Find Your Favorite Celebrity </p>
         <div class="dropdown-container">
            <button class="btn btn-secondary dropdown-toggle btn-outline-danger btn-lg dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> JUST
            <span class="caret"></span></button>
                  <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                    <a class="dropdown-item" href="#">Justin Bieber <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Taylor Swift <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Jay Z <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Beyonce <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Rihanna <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Ariana Grande <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                    <a class="dropdown-item" href="#">Cherie Lum <input type="radio" id="ID" name="NAME" value="VALUE"><label for="ID"></label> </a>
                  </div>
          </div> 
      </div>

CSS

.dropdown-container {
position: relative; }

.dropdown-menu { position: absolute; top: 100%; /* Bottom of button / margin-left: -100px; / More to the left */ }

Answer 1

这就是你要找的吗。

使用的CSS是

.dropdown-container {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0px;
}

.dropdown-menu a {
  display: block;
}

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

JSFiddle Demo