The zIndex property sets or returns the stack order of a positioned element.
An element with greater stack order (1) is always in front of another element with lower stack order (0).
Tip: A positioned element is an element with the position property set to: relative, absolute, or fixed.
Set the zIndex property:
Return the zIndex property:
|auto||The browser determines the stack order of the element (based on its order in the document). This is default|
|number||An integer that defines the stack order of the element. Negative values are allowed|
|inherit||The value of the zIndex property is inherited from parent element|
The zIndex property is supported in all major browsers.
Tip: This property is useful if you want to create overlapping elements.
Change the stack order of an <img> element:
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