CSS z-index Property
Example
Set the z-index for an image:
img
{
position: absolute;
left: 0px;
top: 0px;
z-index: -1;
}
Try it Yourself »
Definition and Usage
The z-index property specifies the stack order of an element.
An element with greater stack order is always in front of an element with a lower stack order.
Note: z-index only works on positioned elements (position: absolute, position: relative, position: fixed,
or position: sticky) and flex items (elements that are direct children of
display:flex elements).
Note: If two positioned elements overlap without a z-index
specified, the element positioned last in the HTML code will be shown on top.
| Default value: | auto |
|---|---|
| Inherited: | no |
| Animatable: | yes. Read about animatable Try it |
| Version: | CSS2 |
| JavaScript syntax: | object.style.zIndex="-1" Try it |
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| z-index | 1.0 | 4.0 | 3.0 | 1.0 | 4.0 |
CSS Syntax
z-index: auto|number|initial|inherit;
Property Values
| Value | Description | Demo |
|---|---|---|
| auto | Sets the stack order equal to its parents. This is default | Demo ❯ |
| number | Sets the stack order of the element. Negative numbers are allowed | Demo ❯ |
| initial | Sets this property to its default value. Read about initial | |
| inherit | Inherits this property from its parent element. Read about inherit |
Related Pages
CSS tutorial: CSS Positioning
HTML DOM reference:
zIndex property
