outline-offset
概要
outline-offset CSS 属性用于设置 outline 与一个元素边缘或边框之间的间隙。
outline 是元素的轮廓，悬浮在元素边框之上。元素和其轮廓之间是透明的。也就是说，它们之间的颜色会继承父元素的背景色。
| 初始值 | 0 |
|---|---|
| 适用元素 | all elements |
| 是否是继承属性 | 否 |
| 计算值 | as specified, but with relative lengths converted into absolute lengths |
| Animation type | a length |
The space will be transparent (the parent will determine the background).
Syntax
/* <length> values */
outline-offset: 3px;
outline-offset: 0.2em;
/* Global values */
outline-offset: inherit;
outline-offset: initial;
outline-offset: unset;
Values
<length>- 元素和轮廓间的宽度。详见
<length>. 负值将轮廓绘制在元素之内。
Formal syntax
outline-offset =
<length>
Examples
p {
outline: dashed thin;
/* Move the outline 10px away from the border */
outline-offset: 10px;
border:1px solid black;
}
Html
<p>outline: offset 10px. Border is solid and outline is dashed</p>上面的代码将产生以下效果：
另一个例子：
outline: multiple offsets;
Specifications
| Specification | Status | Comment |
|---|---|---|
| CSS Transitions outline-offset |
Working Draft | Defines outline-offset as animatable. |
| CSS Basic User Interface Module Level 3 outline-offset |
Recommendation | Initial definition |
Browser compatibility
BCD tables only load in the browser