Style width property

Definition and Usage

width property to set or return the width of the element.

width The attribute is only valid for block-level elements or elements with absolute or fixed positioning. Overflowing content can be set using overflow property to handle.

Tip:Use height property Set or return the height of the element.

See also:

CSS Tutorial:CSS dimension

CSS Tutorial:CSS rammemodel

CSS Reference Manual:width property

Example

Example 1

Set the width of the <button> element:

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

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Example 2

Change the width of the <div> element:

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

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Example 3

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

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

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Example 4

Return the width of the <img> element:

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

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Syntax

Return width property:

object.style.width

Set width property:

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

Attribute value

Value Description
auto Browser sets the width. Default.
length Define the width, by length unit.
% Define 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
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