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The outline property is used in CSS to create a border around an element to highlight focus or status. It is different from the border property in that it does not take up space on the element, is automatically displayed when the element gets focus, and the color and style can be set independently. The syntax is as follows: outline:
Usage of outline in CSS
outline
attribute is used in CSS for elements Creates a border around it to highlight its focus or status. It is similar to the border
property, but has some important differences:
differs from the border
property
outline
Does not take up element space, just visual effect. outline
is automatically displayed when the element is фокус, while border
is always visible. The color and style of outline
can be set independently, while the color and style of border
are usually the same as the style of the element itself. Syntax
outline
The syntax of the attribute is as follows:
<code>outline: <color> <style> <width>;</style></color></code>
Among them,
color
Specifies the color of the outline. style
Specifies the line style for the outline (for example, dotted, dashed, solid). width
Specifies the width of the outline. Usage
outline
The attribute can be applied in the following ways:
outline
attribute for it. outline
can be displayed to indicate that it is being edited. outline
to create visual separators around elements to make them more visible on the page. outline
to view the bounds of an element to help identify overlap or spacing issues. Example
The following example shows how to use the outline
attribute to highlight a selected button:
button:focus { outline: 2px solid red; }
When When a button has focus, it displays a 2-pixel-wide red outline
.
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