Style zIndex Property

Definition and Usage

zIndex Sets or returns the stacking order of the positioned element.

elements with a higher stacking order (1) are always in front of elements with a lower stacking order (0).

Tip:Positioning elements are position property Set to:relative,absolute or fixed elements.

Tip:This property is very useful if you want to create overlapping elements.

See also:

CSS Tutorial:CSS positionering

CSS Reference Manual:z-index property

Example

Example 1

Change the stacking order of the <img> element:

document.getElementById("img1").style.zIndex = "1";

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Example 2

Change the z-index property value of the <div> element:

document.getElementById("myDIV").style.zIndex = "-1";

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Example 3

Return the z-index property value of the <img> element:

alert(document.getElementById("img1").style.zIndex);

Try it yourself

Syntax

Return zIndex property:

object.style.zIndex

Set zIndex property:

object.style.zIndex = "auto|number|initial|inherit"

Property value

Value Description
auto The browser determines the stacking order of the element (based on its order in the document). Default.
number An integer that defines the stacking order of the element. Negative values are allowed.
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 stacking order of the element.
CSS version: CSS2

Browserkompatibilitet

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
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