Style width property

Definition and Usage

width property sets or returns the width of an element.

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

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

See also:

CSS Tutorial:CSS Dimension

CSS Tutorial:CSS Frame Model

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"

Property Value

Value Description
auto Browser sets the width. Default.
length Defines the width in length units.
% Defines the width of the parent element in percentages.
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 that represents the width of an element.
CSS Version: CSS1

Browser Support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
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