CSS border-top-width Property

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Demo

border-top-width: 5px;

CSS border-top-width Property

CSS border-top-width property sets the width of the top border of an element.

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ border: 1px solid black; border-top-width: 5px; } </style> </head> <body> <h1>CSS border-top-width Property</h1> <div> This is div container. </div> </body> </html>

Syntax

Using CSS

element{ border-top-width: 5px; }

Using Javascript

object.style.borderTopWidth="5px";

Animatable

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

Default Value

Default value for CSS border-top-width property is medium.

Property Value

The following table provides a list of all values for CSS border-top-width property.

ValueExplanation
thinSpecifies a thin border.
mediumSpecifies a medium border.
thickSpecifies a thick border.
lengthAllows you to define the thickness of the border in any CSS length unit.

All in One

In the following example, we will demonstrate all values of CSS border-top-width property.

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> div{ border-style: solid; } #point{ border-top-width: thin; } #point1{ border-top-width: medium; } #point2{ border-top-width: thick; } #point3{ border-top-width: 5px; } </style> </head> <body> <h1>CSS border-top-width Property</h1> <h2>border-top-width: thin;</h2> <div id="point"> This is div container. </div> <h2>border-top-width: medium;</h2> <div id="point1"> This is div container. </div> <h2>border-top-width: thick;</h2> <div id="point2"> This is div container. </div> <h2>border-top-width: 5px;</h2> <div id="point3"> This is div container. </div> </body> </html>

Using JavaScript

In the following example, we will demonstrate how to change the CSS border-top-width 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-style: dotted; border-top-width: 1px; } </style> </head> <body> <h1>CSS border-top-width 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.borderTopWidth = "5px"; } </script> </body> </html>

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