CSS z-index Property
Example
img {
position: absolute;
z-index: -1;
}Meaning
The z-index property defines a layering or stacking context for positioned elements.
Note: The 0 being the default z-index level.
Overlapping elements with a larger z-index cover those with a smaller one.
| Default value: | auto |
| Inherited: | No |
| Animatable: | Yes |
| Version: | CSS2 |
| JavaScript syntax: | |
Standard Syntax
z-index: auto|number|initial|inherit|revert|revert-layer|unset;Browser Support
The numbers in the table specify the first browser version that fully supports the property.
Status
Property Values
The following table describes the values of this property.
| Value | Description |
|---|---|
| auto | This is default value. The auto value tries to determine the z-placement of an element automatically by its markup position in the document. |
| number | Specifies the layering values to an element, with higher numbers layering above lower numbers. Negative numbers are allowed. |
| initial | Sets this property to its default value. |
| inherit | If specified, the associated element takes the computed value of its parent element animation-delay property. |
| revert | Reverts the cascaded value of the property from its current value to the value the property |
| revert-layer | Rollback styles to the ones specified in previous cascade layers. |
| unset | Resets a property to its inherited value if the property naturally inherits from its parent, and to its initial value if not. |
Default CSS Property Values
selectors {
z-index: auto;
}