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• 句法
• 形式定义
• 形式句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

padding-bottom CSS property sets the height of the padding area on the bottom of an element.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

An element's padding area is the space between its content and its border.

注意： padding property can be used to set paddings on all four sides of an element with a single declaration.

句法

/* <length> values */
padding-bottom: 0.5em;
padding-bottom: 0;
padding-bottom: 2cm;
/* <percentage> value */
padding-bottom: 10%;
/* Global values */
padding-bottom: inherit;
padding-bottom: initial;
padding-bottom: unset;
					

padding-bottom property is specified as a single value chosen from the list below. Unlike margins, negative values are not allowed for padding.

值

<length>

The size of the padding as a fixed value. Must be nonnegative.

<percentage>

The size of the padding as a percentage, relative to the width of the containing block. Must be nonnegative.

形式定义

初始值	0
适用于	all elements, except table-row-group , table-header-group , table-footer-group , table-row , table-column-group and table-column . It also applies to ::first-letter and ::first-line .
继承	no
百分比	refer to the width of the containing block
计算值	the percentage as specified or the absolute length
动画类型	a length

形式句法

<length> | <percentage>
					

范例

Setting padding bottom with pixels and percentages

.content { padding-bottom: 5%; }
.sidebox { padding-bottom: 10px; }
					

规范

规范	状态	注释
CSS 基本 Box 模型 The definition of 'padding-bottom' in that specification.	工作草案	无变化。
CSS Level 2 (Revision 1) The definition of 'padding-bottom' in that specification.	推荐	无变化。
CSS Level 1 The definition of 'padding-bottom' in that specification.	推荐	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
padding-bottom	Chrome 完整支持 1	Edge 完整支持 12	Firefox 完整支持 1	IE 完整支持 4	Opera 完整支持 3.5	Safari 完整支持 1	WebView Android 完整支持 ≤37	Chrome Android 完整支持 18	Firefox Android 完整支持 4	Opera Android 完整支持 14	Safari iOS 完整支持 1	Samsung Internet Android 完整支持 1.0

图例

完整支持

完整支持

另请参阅

• CSS 基本 Box 模型介绍
• padding-top , padding-right , padding-left 和 padding 简写
• The mapped logical properties: padding-block-start , padding-block-end , padding-inline-start ，和 padding-inline-end and the shorthands padding-block and padding-inline

元数据

• 最后修改： Jul 20, 2020

相关话题

1. CSS
2. CSS 参考
3. CSS Box Model
4. 指南

   1. CSS 基本 Box 模型介绍
   2. Mastering margin collapsing
5. 特性

   1. height
   2. margin-bottom
   3. margin-left
   4. margin-right
   5. margin-top
   6. margin-trim
   7. max-height
   8. max-width
   9. min-height
   10. min-width
   11. overscroll-behavior
   12. overscroll-behavior-block
   13. overscroll-behavior-inline
   14. overscroll-behavior-x
   15. overscroll-behavior-y
   16. padding
   17. padding-bottom
   18. padding-left
   19. padding-right
   20. padding-top
   21. visibility
   22. width