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。

An outline is a line that is drawn around elements, outside the border edge.

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>

The width of the space. See <length> for possible units. Negative values place the outline inside the element.

Formal syntax

<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>

The code above produces this effect:

Another example:

outline: multiple offsets;

Specifications

Browser compatibility