html - 下拉菜单不起作用且位置错误

Question

https://jsfiddle.net/0q5s98sL/

下面附上一个jsfiddle，目前下拉菜单不起作用，我希望它位于右上角而不是左边，

如果可能的话，选择下拉菜单来填充整个导航栏，因为此 Web 应用程序仅适用于移动设备，

有人知道我该如何解决这些问题吗？

提前致谢

body {
  background-color: black;
}

#icon {
  max-width: 200px;
  margin: 1% auto;
}

#navlogo {
  position: absolute;
  right: 3rem;
  height: 4rem;
  top: 2rem;
  line-height: 100px;
}

footer {
  width: 100%;
  background: black;
  color: white;
}

.fa {
  padding: 20px;
  font-size: 30px;
  color: white;
}

.fa:hover {
  color: lightgrey;
  text-decoration: none;
}

#logo
/*main logo*/

{
  position: absolute;
  left: 0px;
  right: 0px;
  bottom: 0;
  margin-left: auto;
  margin-right: auto;
  z-index: -1;
  line-height: 100px;
}

h1 {
  font-family: "Josefin Sans";
  font-size: 2.5em;
  right: 3rem;
}

@media (max-width: 600px) {
  .carousel-caption {
    display: none;
  }
}

#icon {
  max-width: 150px;
}

h4 {
  font-size: 1.9em;
}

img {
  max-height: 100px;
}

p {
  padding-bottom: 5rem;
}

p#h6 {
  font-family: "Josefin Sans";
  color: white;
  font-size: 3.5rem;
  float: left;
  line-height: 150px;
  padding-top: 0;
  z-index: -1;
  margin-left: 1rem;
}

#h7 {
  font-family: "Josefin Sans";
  color: white;
  float: left;
  font-size: 2.5rem;
  line-height: 150px;
}

#h8 {
  font-family: "Josefin Sans";
  color: white;
  float: left;
  font-size: 2.5rem;
  line-height: 150px;
}

h4 {
  font-family: "Josefin Sans";
  color: white;
  font-size: 3rem;
  width: 100px;
  text-align: left;
  position: fixed;
  top: 0rem;
  left: 1rem;
}

.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial;
}

.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  background-color: inherit;
}

.navbar a:hover,
.dropdown:hover .dropbtn {
  background-color: red;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  width: 100%;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

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

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

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

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js">
</script>
<script type="text/javascript" src="js/java.js"></script>

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">


<div class="navbar">

  <div class="dropdown">
    <button class="dropbtn"> <img src="http://konpakuto.com/logo.jpg">
      <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
      <a href="#">Link 1</a>
      <a href="#">Link 2</a>
      <a href="#">Link 3</a>
    </div>
  </div>
</div>

<h4 style="padding-bottom:-40rem;">health</h4>

Answer 1

通过添加以下 CSS，您将获得一个有效的下拉列表

.navbar {
        overflow: visible;
        }
    .dropdown {
        float: left;
        overflow: visible;
    }

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