Style boxSizing Property

❮ Previous ❮ Style Object Reference Next ❯

Example

Change the boxSizing property:

document.getElementById("myDIV").style.boxSizing = "border-box";

Description

The boxSizing property allows you to define certain elements to fit an area in a certain way.

For example, if you want two bordered boxes side by side, it can be achieved through setting boxSizing to "border-box". This forces the browser to render the box with the specified width and height, and place the border and padding inside the box.

Browser Support

Property
boxSizing	Yes	Yes	Yes	Yes	Yes

Syntax

Return the boxSizing property:

object.style.boxSizing

Set the boxSizing property:

object.style.boxSizing = "content-box|border-box|initial|inherit"

Property Values

Value	Description
content-box	Default value. This is the behavior of width and height as specified by CSS2.1. The specified width and height (and min/max properties) apply to the width and height respectively of the content box of the element. The padding and border of the element are laid out and drawn outside the specified width and height
border-box	The specified width and height (and min/max properties) on this element determine the border box of the element. That is, any padding or border specified on the element is laid out and drawn inside this specified width and height. The content width and height are calculated by subtracting the border and padding widths of the respective sides from the specified 'width' and 'height' properties
initial	Sets this property to its default value. Read about initial
inherit	Inherits this property from its parent element. Read about inherit

Technical Details

Default Value:	content-box
Return Value:	A String, representing the box-sizing property of an element
CSS Version	CSS3

CSS reference: box-sizing property