CSS Outline

In CSS (Cascading Style Sheets), the outline property is used to create a visible outline around an element. It is similar to the border property, but it does not take up any space or affect the layout of the element.

The outline property accepts several values:

• outline-width: Specifies the thickness of the outline. It can be set to a specific value (in pixels, ems, or other units) or one of the predefined values: thin, medium, or thick.
• outline-style: Defines the style of the outline. It can be set to solid, dashed, dotted, double, groove, ridge, inset, or outset. These values are similar to the ones used for the border-style property.
• outline-color: Sets the color of the outline. It can be specified using a color name, a hex code, an RGB value, or any other valid CSS color format.
• outline-offset: Specifies the distance between the outline and the element’s border or edge. It creates space between the outline and the content, allowing it to be visually separated from the element.

Here’s an example of how to use the outline property:

css

/* Applying outline to an element */
.example {
  outline: 2px solid blue;
}

/* Using individual outline properties */
.example {
  outline-width: 2px;
  outline-style: solid;
  outline-color: blue;
  outline-offset: 5px;
}

It’s important to note that the outline property is not supported in some older versions of Internet Explorer (up to IE8). However, it is widely supported in modern browsers.