CSS border-bottom Property

February 10, 2021 12:37 pm IST

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CSS border-bottom Property

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

Example

HTML Online Editor

<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ border-bottom: 3px dotted green; } </style> </head> <body> <h1>CSS border-bottom Property</h1> <div> This is div container. </div> </body> </html>

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Syntax

Using CSS

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

Using Javascript

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

Animatable

Yes, border-bottom property is animatable. CSS Animatable Properties Reference.

Default Value

Default value for CSS border-bottom property is medium none black.

Property Value

The following table provides a list of values for CSS border-bottom property.

Value	Type	Explanation
border-bottom-width	Optional	Specifies the width of the bottom border. For example, 1px. Default value is 'medium'.
border-bottom-style	Required	Specifies the style of the bottom border. For example, solid. Default value is 'none'.
border-bottom-color	Optional	Specifies the color of the bottom border. For example, red. Default value is 'black'.

Using JavaScript

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

Example

HTML Online Editor

<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ padding: 10px; margin-bottom: 10px; border-bottom: 1px solid red; } </style> </head> <body> <h1>CSS border-bottom 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.borderBottom = "5px dashed blue"; } </script> </body> </html>

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