padding-top
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
尝试一下
语法
css
/* <length> 值 */
padding-top: 0.5em;
padding-top: 0;
padding-top: 2cm;
/* <percentage> 值 */
padding-top: 10%;
/* 全局值 */
padding-top: inherit;
padding-top: initial;
padding-top: revert;
padding-top: revert-layer;
padding-top: unset;
padding-top 属性可以从下面的列表中指定一个值。与 margin 不同，padding 不允许使用负值。
值
<length>-
作为定值的内边距尺寸。必须是非负值。
<percentage>-
相对于包含块的行内尺寸（水平语言中的宽度，由
writing-mode定义）的百分比。必须是非负值。
形式定义
| 初始值 | 0 |
|---|---|
| 适用元素 | 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. |
| 是否是继承属性 | 否 |
| Percentages | 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 |
形式语法
padding-top =
<length-percentage [0,∞]>
<length-percentage> =
<length> |
<percentage>
示例
使用像素和百分比值设置上内边距
css
.content {
padding-top: 5%;
}
.sidebox {
padding-top: 10px;
}
规范
| Specification |
|---|
| CSS Box Model Module Level 3 # padding-physical |
浏览器兼容性
BCD tables only load in the browser