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;

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​​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​​


​​<length>​​

​​Examples​​

p {
  outline: dashed thin;
  /* Move the outline 10px away from the border */
  outline-offset: 10px;
  border:1px solid black;
}

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Html

<p>outline: offset 10px. Border is solid and outline is dashed</p>

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上面的代码将产生以下效果：

CSS---outline-offset--元素边缘或边框之间的间隙_css