Community
Learn
Tools Library
AI Tools
Leisure
search
English
Home > List of blog posts > 盒模型的基础和居中（0617）
Blogger Information
Blog 48
fans 0
comment 0
visits 34360
Special Recommendation
More>
Related recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
盒模型的基础和居中（0617）
丶久而旧之丶
Original
531 people have browsed it

  1. <!DOCTYPE html>
  2. <html>
  3.   <head>
  4.     <meta charset="UTF-8" />
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6.     <title>盒模型</title>
  7.     <style>
  8.       /* 样式初始化，设置了整个页面内外边距为0，
  9.         设置盒子大小不随内边距和边框的大小而变化，
  10.         设置背景裁切到内容区不覆盖内边距和边框 */
  11.       * {
  12.         margin: 0;
  13.         padding: 0;
  14.         box-sizing: border-box;
  15.         background-clip: content-box;
  16.       }
  17.       /* 设置第一个盒子的宽高，背景色，边框，下外边距和内边距 */
  18.       .box1 {
  19.         width: 200px;
  20.         height: 200px;
  21.         background-color: burlywood;
  22.         border: 6px solid black;
  23.         margin-bottom: 20px;
  24.         padding: 20px;
  25.       }
  26.       /* 设置盒子的宽高，背景色，边框，内边距，上外边距，添加定位属性并使其向下和向右偏移 */
  27.       .box2 {
  28.         width: 200px;
  29.         height: 200px;
  30.         background-color: aquamarine;
  31.         border: 2px solid black;
  32.         padding: 20px;
  33.         margin-top: 10px;
  34.         position: relative;
  35.         top: 10px;
  36.         left: 20px;
  37.       }
  38.       /* 设置第三个盒子的宽高，背景色，边框，
  39.       添加绝对定位属性，通过偏移值充满整个父容器后用margin：auto进行水平垂直居中 */
  40.       .box3 {
  41.         width: 30px;
  42.         height: 30px;
  43.         background-color: beige;
  44.         border: 2px solid black;
  45.         position: absolute;
  46.         top: 0;
  47.         right: 0;
  48.         bottom: 0;
  49.         left: 0;
  50.         margin: auto;
  51.       }
  52.     </style>
  53.   </head>
  54.   <body>
  55.     <div class="box1"></div>
  56.     <div class="box2">
  57.       <div class="box3"></div>
  58.     </div>
  59.   </body>
  60. </html>

总结

1.了解了盒模型的基础知识（内边距，外边距，边框的表达）

2.明白了如何使背景只覆盖内容区而不会覆盖到内边距

3.了解了如何自定义盒子的大小，使其不会因调整内边距和边框而使得盒子的大小发生变化

4.了解块级元素的居中尤其是垂直居中是如何实现的

5.对于图片偏移的js代码多看回放，加深理解。

Correcting teacher：GuanhuiGuanhui

Correction status：qualified

Teacher's comments：写的还行，标题注意一下！
Statement of this Website
The copyright of this blog article belongs to the blogger. Please specify the address when reprinting! If there is any infringement or violation of the law, please contact admin@php.cn Report processing!
All comments Speak rationally on civilized internet, please comply with News Comment Service Agreement
0 comments
Author's latest blog post