How to implement menu option layout using HTML and CSS

Title: Using HTML and CSS to implement menu option layout

Introduction:
In web development, menu options are one of the common elements in web pages. Through reasonable HTML structure and CSS styles, we can achieve a variety of menu option layouts. This article will introduce how to use HTML and CSS to implement common menu option layouts, and provide specific code examples for readers' reference.

1. Preparation
Before starting to write HTML and CSS code, we need to determine the basic structure and style of the menu options. Usually, a menu option contains the menu name and the corresponding link, which we can use unordered lists (

) and list items (
• ).

  Code example:

  <ul class="menu">
    <li><a href="#">菜单选项1</a></li>
    <li><a href="#">菜单选项2</a></li>
    <li><a href="#">菜单选项3</a></li>
    ...
  </ul>

  2. Horizontal menu layout
  Horizontal menu layout is the most common menu option layout, with menu options arranged on a horizontal line.

  Use the display attribute and float attribute in CSS to achieve horizontal menu layout.

  Code example:

  .menu li {
    float: left;
  }
  
  .menu a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: #000;
  }
  
  .menu a:hover {
    background-color: #ccc;
  }

  3. Vertical menu layout
  Vertical menu layout is a layout method in which menu options are arranged in the vertical direction, and each menu option occupies an entire row. We can use the display attribute and width settings to implement vertical menu layout.

  Code example:

  .menu li {
    display: block;
    width: 200px;
  }
  
  .menu a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: #000;
  }
  
  .menu a:hover {
    background-color: #ccc;
  }

  4. Drop-down menu layout
  The drop-down menu layout is a common menu option layout. When the mouse hovers over the main menu option, the corresponding Drop-down menu.

  Implement drop-down menu layout through CSS pseudo-class:hover.

  Code example:

  <ul class="menu">
    <li><a href="#">菜单选项1</a>
      <ul class="submenu">
        <li><a href="#">子菜单1</a></li>
        <li><a href="#">子菜单2</a></li>
        ...
      </ul>
    </li>
    <li><a href="#">菜单选项2</a></li>
    <li><a href="#">菜单选项3</a></li>
    ...
  </ul>

  .menu li {
    float: left;
    position: relative;
  }
  
  .menu a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: #000;
  }
  
  .submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
  }
  
  .menu li:hover .submenu {
    display: block;
  }

  Summary:
  By rationally using HTML and CSS, we can achieve a variety of menu option layouts. Through the above sample code, we can implement horizontal menu layout, vertical menu layout and drop-down menu layout. Readers can adjust the code appropriately according to their own needs and apply it to their own projects. I hope this article can provide some help to readers in using HTML and CSS to implement the layout of menu options.

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