CSS border-bottom Property

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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>

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.

ValueTypeExplanation
border-bottom-widthOptionalSpecifies the width of the bottom border.
For example, 1px.
Default value is 'medium'.
border-bottom-styleRequiredSpecifies the style of the bottom border.
For example, solid.
Default value is 'none'.
border-bottom-colorOptionalSpecifies 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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