inset
Baseline 广泛可用 *
inset CSS 属性是一个简写属性，它对应于 top、right、bottom 和/或 left 属性。它具有与 margin 简写属性相同的多值语法。
这些内嵌属性，包括 inset，对非定位元素没有影响。
试一试
inset: 1em;
inset: 5% 0;
inset: 2em 50px 20px;
inset: 10px 30% 20px 0;
inset: 0;
<section id="default-example">
<div class="example-container">
<div id="example-element">I am absolutely positioned.</div>
<p>
As much mud in the streets as if the waters had but newly retired from the
face of the earth, and it would not be wonderful to meet a Megalosaurus,
forty feet long or so, waddling like an elephantine lizard up Holborn
Hill.
</p>
</div>
</section>
.example-container {
border: 0.75em solid #ad1457;
padding: 0.75em;
text-align: left;
position: relative;
width: 100%;
min-height: 200px;
}
#example-element {
background-color: #07136c;
border: 6px solid #ffa000;
color: white;
position: absolute;
inset: 0;
}
虽然它属于 CSS 逻辑属性和值模块的一部分，但它不定义逻辑偏移。它定义物理偏移，无论元素的书写模式、方向性和文本方向如何。
构成属性
此属性是以下 CSS 属性的简写：
语法
css
/* <length> values */
inset: 10px; /* value applied to all edges */
inset: 4px 8px; /* top/bottom left/right */
inset: 5px 15px 10px; /* top left/right bottom */
inset: 2.4em 3em 3em 3em; /* top right bottom left */
inset: calc(anchor(50%) + 10px) anchor(self-start) auto auto;
inset: anchor-size(block) calc(anchor(50%) + 10px) auto
calc(anchor-size(width) / 4);
/* <percentage>s of the width (left/right) or height (top/bottom) of the containing block */
inset: 10% 5% 5% 5%;
/* Keyword value */
inset: auto;
/* Global values */
inset: inherit;
inset: initial;
inset: revert;
inset: revert-layer;
inset: unset;
值
inset 属性接受与 left 属性相同的值。
正式定义
正式语法
inset =
<'top'>{1,4}
<top> =
auto |
<length-percentage> |
<anchor()> |
<anchor-size()>
<length-percentage> =
<length> |
<percentage>
<anchor()> =
anchor( <anchor-name>? &&
<anchor-side> , <length-percentage>? )
<anchor-size()> =
anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )
<anchor-name> =
<dashed-ident>
<anchor-side> =
inside |
outside |
top |
left |
right |
bottom |
start |
end |
self-start |
self-end |
<percentage> |
center
<anchor-size> =
width |
height |
block |
inline |
self-block |
self-inline
示例
为元素设置偏移量
HTML
html
<div>
<span class="exampleText">Example text</span>
</div>
CSS
css
div {
background-color: yellow;
width: 150px;
height: 120px;
position: relative;
}
.exampleText {
writing-mode: sideways-rl;
position: absolute;
inset: 20px 40px 30px 10px;
background-color: #c8c800;
}
结果
规范
| 规范 |
|---|
| CSS 逻辑属性和值第 1 级 # propdef-inset |
| CSS 定位布局模块第 3 级 # propdef-inset |
浏览器兼容性
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