Steps to implement the drop-down tab menu effect of a responsive navigation bar using pure CSS-CSS Tutorial-php.cn

Steps to implement the drop-down tab menu effect of a responsive navigation bar using pure CSS

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Release： 2023-10-28 09:58:49

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Steps to implement the drop-down tab menu effect of a responsive navigation bar using pure CSS

Pure CSS steps to implement the drop-down tab menu effect of the responsive navigation bar

The navigation bar is one of the common elements in web pages, and the drop-down tab menu It is an effect often used in navigation bars and can provide more navigation options. This article will introduce how to use pure CSS to implement a responsive navigation bar drop-down tab menu effect.

Step 1: Build a basic HTML structure

We first need to build a basic HTML structure for demonstration and add some styles to the navigation bar. The following is a simple HTML structure:



  
    响应式导航栏
    
  

  
    
      首页
      新闻
      图片
      视频
      论坛
      联系我们

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Step 2: Add CSS styles

Next, we need to add some CSS styles to achieve the effect of a responsive navigation bar. We can use media queries to define styles for different screen sizes. The following is an example CSS style:

/* 全局样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 导航栏选项隐藏样式 */
.navbar a:not(:first-child) {
  display: none;
}

/* 响应式导航栏样式 */
@media screen and (max-width: 600px) {
  .navbar a:not(:first-child) {
    display: none;
  }
  
  /* 显示导航栏选项 */
  .navbar a.icon {
    float: right;
    display: block;
  }
  
  /* 导航栏选项悬停样式 */
  .navbar.responsive a.icon {
    background-color: #ddd;
    color: #333;
  }
  
  /* 导航栏选项悬停后的下拉菜单样式 */
  .navbar.responsive .navbar-dropdown {
    display: block;
  }
  
  /* 导航栏下拉菜单样式 */
  .navbar-dropdown {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    z-index: 1;
  }
  
  /* 导航栏下拉菜单选项样式 */
  .navbar-dropdown a {
    color: #000;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
  }
  
  /* 导航栏下拉菜单选项悬停样式 */
  .navbar-dropdown a:hover {
    background-color: #f1f1f1;
  }
}

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Step 3: Add JavaScript code

In realizing the effect of the responsive navigation bar, we also need to use JavaScript to control the expansion and collapse of the menu. The following is a simple JavaScript code example:

/* 响应式导航栏菜单展开与收起的函数 */
function responsiveMenu() {
  var x = document.getElementById("myTopnav");
  if (x.className === "navbar") {
    x.className += " responsive";
  } else {
    x.className = "navbar";
  }
}

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Step 4: Add drop-down menu content

Finally, we need to add the content of the drop-down menu to the navigation bar. This part of the content will be placed in a

tag, and the .navbar-dropdown class will be used for style control. Here is an example:


  音乐
  游戏
  电影
  书籍

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In summary, through the above four steps, we can achieve a simple pure CSS responsive navigation bar drop-down tab menu effect. Using media queries and JavaScript, we can display and hide content in different screen sizes to provide users with a better experience.

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