How to use CSS Positions layout to implement measurement layout of web pages-CSS Tutorial-php.cn

How to use CSS Positions layout to implement measurement layout of web pages

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Release： 2023-09-26 09:39:20

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如何使用CSS Positions布局实现网页的测量布局

How to use CSS Positions layout to implement measured layout of web pages

In web development, layout is a very important aspect. CSS Positions layout provides various ways to position elements, making the layout of web pages more flexible and free. This article will introduce how to use CSS Positions layout to implement measured layout of web pages, and provide specific code examples.

Before using CSS Positions layout, you first need to understand the three main positioning properties: static, relative and absolute. Among them, static is the default positioning attribute, and the elements are arranged according to the normal flow layout; relative allows positioning relative to its own position; absolute allows positioning relative to the nearest non-static parent element. By using these positioning attributes flexibly, a variety of different web page layouts can be achieved.

The following is a simple web page layout example that shows how to use CSS Positions layout to implement measurement layout:

<!DOCTYPE html>
<html>
<head>
  <style>
    .container {
      position: relative;
      width: 500px;
      height: 300px;
      border: 1px solid black;
    }

    .box1 {
      position: absolute;
      top: 20px;
      left: 20px;
      width: 100px;
      height: 100px;
      background-color: blue;
    }

    .box2 {
      position: absolute;
      top: 20px;
      right: 20px;
      width: 100px;
      height: 100px;
      background-color: red;
    }

    .box3 {
      position: relative;
      top: 50px;
      left: 50px;
      width: 200px;
      height: 200px;
      background-color: yellow;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="box1"></div>
    <div class="box2"></div>
    <div class="box3"></div>
  </div>
</body>
</html>

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In the above example, we created a container.container and placed it in it. Three boxes are placed, .box1, .box2, and .box3. By using different positioning attributes and specific positioning values, we can position these boxes in different locations.

.box1 and .box2 use position: absolute, which are located at the upper left corner and upper right corner of the container respectively. By setting the top and left or right properties, we can accurately control the position of the box.

.box3 uses position: relative, which means it will be positioned relative to its normal flow position. By setting the top and left properties, we can fine-tune the box inside the container.

The above is a simple example of using CSS Positions layout to implement the measurement layout of a web page. By rationally using positioning attributes and specific positioning values, we can achieve more complex and precise effects in layouts. I hope this article can help you with web page layout!

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