CSS outline Property

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Demo

outline: 2px solid #000;

CSS outline Property

CSS outline property sets an element's outline. It is a shorthand property of the following CSS properties

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ outline: 1px solid red; } </style> </head> <body> <h1>CSS outline Property</h1> <div> This is div container. </div> </body> </html>

Syntax

Using CSS

element{ //outline: outline-width outline-style outline-color; outline: 1px solid red; }

Using Javascript

object.style.outline="1px solid red";

Animatable

Yes, outline property is animatable. CSS Animatable Properties Reference.

Default Value

Default value for CSS outline property is medium invert color.

Note: If outline-color is omitted, the color applied will be the color of the text.

Property Value

The following table provides a list of all values for CSS outline property.

ValueTypeExplanation
outline-widthOptionalSpecifies the width of the outline.
For example, 1px.
Default value is 'medium'.
outline-styleRequiredSpecifies the style of the outline
For example, solid.
Default value is 'invert'.
outline-colorOptionalSpecifies the color of the outline
For example, red.
Default value is 'color'.

Using JavaScript

In the following example, we will demonstrate how to change the CSS outline property of an element using JavaScript.

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ padding: 10px; margin-bottom: 10px; outline: 1px solid red; } </style> </head> <body> <h1>CSS outline Property</h1> <div> This is div container. </div> <button onclick="myFunction()">Click Me</button> <script> var x = document.getElementsByTagName("div")[0]; function myFunction(){ x.style.outline = "5px dashed blue"; } </script> </body> </html>

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