CSS width Property

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CSS width Property

CSS width property specifies the width of an element.

Note: The width of an element does not include borders, margins, or padding.

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> #point{ width: 300px; padding: 25px 0; border: 1px solid #8c8c8c; } </style> </head> <body> <div id="point"> Width of this container (div) is 300px. </div> </body> </html>

Syntax

Using CSS

element{ width: 300px; }

Using Javascript

object.style.width="300px";

Animatable

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

Default Value

Default value for CSS width property is auto.

Property Value

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

ValueExplanation
lengthSpecifies the width (px, cm, etc) as an absolute value.
autoThe browser will calculate and select a width for the specified element.
%Specifies the width as a percentage of the containing block's content width.

Using Percentage Value

Use the percentage value to make an element's width responsive.

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> #point{ width: 75%; padding: 25px 0; border: 1px solid #8c8c8c; } </style> </head> <body> <div id="point"> Width of this container (div) is 75%. </div> </body> </html>

Using JavaScript

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

Example

HTML Online Editor
<!DOCTYPE html> <html lang="en-US"> <head> <style> #point{ padding: 25px 0; border: 1px solid #8c8c8c; } </style> </head> <body> <div id="point"> Width of this container (div) is auto. </div> <button onclick="myFunction()">Click Me</button> <script> function myFunction(){ var x = document.getElementById("point"); x.style.width = "300px"; } </script> </body> </html>

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