Style width property

Definition and Usage

width property sets or returns the width of the element.

width This property is only effective for block-level elements or elements with absolute or fixed positioning. Overflowing content can be overflow property to handle.

Tip:Use height property Sets or returns the height of the element.

See also:

CSS Tutorial:CSS Dimension

CSS Tutorial:CSS Box Model

CSS Reference Manual:width property

Example

Example 1

Set the width of the <button> element:

document.getElementById("myBtn").style.width = "300px";

Try It Yourself

Example 2

Change the width of the <div> element:

document.getElementById("myDIV").style.width = "500px";

Try It Yourself

Example 3

Change the height and width of the <img> element:

document.getElementById("myImg").style.height = "300px";
document.getElementById("myImg").style.width = "300px";

Try It Yourself

Example 4

Return the width of the <img> element:

alert(document.getElementById("myImg").style.width);

Try It Yourself

Syntax

Return width property:

object.style.width

Set width property:

object.style.width = "auto|length|%|initial|inherit"

Property Value

Value Description
auto Browser sets the width. Default.
length Defines the width, by length units.
% Defines the width of the parent element, by percentage.
initial Sets this property to its default value. See initial.
inherit Inherits this property from its parent element. See inherit.

Technical Details

Default value: auto
Return value: A string representing the width of the element.
CSS Version: CSS1

Browser Support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
Support Support Support Support Support