Question

我正在尝试制作一个具有以下条件的响应式下拉菜单；链接浮动正确；菜单是响应式的；并且有一个下拉菜单。

我曾尝试修改w3学校响应式导航栏，但始终似乎存在无法解决的问题。 w3学校响应式导航栏https://jsfiddle.net/g19h45ep/3/

的JSfiddle

testing code

Answer 1

这里所有链接都在右侧，您想将主页按钮向左移动还是将汉堡包向左移动？

已经向右对齐

body {
  margin: 0;
  font-family: Arial
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}


.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

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

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

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

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

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child),
  .dropdown .dropbtn {
    display: none;
  }
  .topnav a {
    float: right;
  }
  .topnav a.icon {
    float: left;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    left: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: right;
  }
  .topnav.responsive .dropdown {
    float: none;
  }
  .topnav.responsive .dropdown-content {
    position: relative;
  }
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: right;
  }
}

<!DOCTYPE html>
<html>

  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  </head>

  <body>

    <div class="topnav" id="myTopnav">
      <a href="#home">Home</a>
      <a href="#news">News</a>
      <a href="#contact">Contact</a>
      <div class="dropdown">
        <button class="dropbtn">Dropdown 
      <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>
      <a href="#about">About</a>
      <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
    </div>

    <div style="padding-left:16px">
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
    </div>

    <script>
      function myFunction() {
        var x = document.getElementById("myTopnav");
        if (x.className === "topnav") {
          x.className += " responsive";
        } else {
          x.className = "topnav";
        }
      }

    </script>

  </body>

</html>

单击时文本对齐正确**

body {
  margin: 0;
  font-family: Arial
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}


.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

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

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

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

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

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child),
  .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    left: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: right;
  }
  .topnav.responsive .dropdown {
    float: none;
  }
  .topnav.responsive .dropdown-content {
    position: relative;
  }
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: right;
  }
}

<!DOCTYPE html>
<html>

  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  </head>

  <body>

    <div class="topnav" id="myTopnav">
      <a href="#home">Home</a>
      <a href="#news">News</a>
      <a href="#contact">Contact</a>
      <div class="dropdown">
        <button class="dropbtn">Dropdown 
      <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>
      <a href="#about">About</a>
      <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
    </div>

    <div style="padding-left:16px">
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
    </div>

    <script>
      function myFunction() {
        var x = document.getElementById("myTopnav");
        if (x.className === "topnav") {
          x.className += " responsive";
        } else {
          x.className = "topnav";
        }
      }

    </script>

  </body>

</html>

编辑

带有固定导航栏的单独行中的首页行

body {
  margin: 0;
  font-family: Arial
}

.topnav {
  overflow: hidden;
  background-color: #333;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: flex-end;
}

div.topnav > a:first-child {
   display: none;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}


.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

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

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

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

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

@media screen and (max-width: 600px) {
div.topnav > a:first-child {
   display: block;
}
  .topnav a:not(:first-child),
  .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
    flex-direction: column;
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {
    float: none;
  }
  .topnav.responsive .dropdown-content {
    position: relative;
  }
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}

<!DOCTYPE html>
<html>

  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  </head>

  <body>

    <div class="topnav" id="myTopnav">
      <a href="#home"></a>
      <a href="#home">Home</a>
      <a href="#news">News</a>
      <a href="#contact">Contact</a>
      <div class="dropdown">
        <button class="dropbtn">Dropdown 
      <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>
      <a href="#about">About</a>
      <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
    </div>

    <div style="padding-left:16px">
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
    </div>

    <script>
      function myFunction() {
        var x = document.getElementById("myTopnav");
        if (x.className === "topnav") {
          x.className += " responsive";
        } else {
          x.className = "topnav";
        }
      }

    </script>

  </body>

</html>

Answer 2

如果我正确理解，那么在响应断点中，您正在尝试使“新闻”，“联系人”，“下拉列表”和“关于”对齐正确吗？如果是这样，我希望这会有所帮助： https://jsfiddle.net/fLjged3s/

我在CSS中添加了以下内容：

.topnav a:nth-child(n+2) {
  text-align: right !important;
}

和text-align：.dropdown .dropbtn

的权利

body {
  margin: 0;
  font-family: Arial
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}
.topnav a:nth-child(n+2) {
  text-align: right !important;
}

.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
  text-align: right !important;
}

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

.topnav a:hover,
.dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

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

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

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child),
  .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {
    float: none;
  }
  .topnav.responsive .dropdown-content {
    position: relative;
  }
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}

<!DOCTYPE html>
<html>

  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  </head>

  <body>

    <div class="topnav" id="myTopnav">
      <a href="#home">Home</a>
      <a href="#news">News</a>
      <a href="#contact">Contact</a>
      <div class="dropdown">
        <button class="dropbtn">Dropdown 
      <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>
      <a href="#about">About</a>
      <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
    </div>

    <div style="padding-left:16px">
      <h2>Responsive Topnav with Dropdown</h2>
      <p>Resize the browser window to see how it works.</p>
      <p>Hover over the dropdown button to open the dropdown menu.</p>
    </div>

    <script>
      function myFunction() {
        var x = document.getElementById("myTopnav");
        if (x.className === "topnav") {
          x.className += " responsive";
        } else {
          x.className = "topnav";
        }
      }

    </script>

  </body>

</html>

如何使用下拉链接使响应式粘滞/固定位置（链接向右浮动）？

2 个答案: