z-index
Sets the stack order of a positioned element. Elements with a higher z-index are always in front of an element with a lower z-index.
Quick example
.modal {
position: fixed;
z-index: 9999;
/* ensures the modal stays on top of everything else */
}Quick facts
Initial value
autoInherited
No
Applies to
positioned elements
Animation type
integer
Values
auto z-index Browser Support
Widely available Since 2015 96% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.
Safe to use without fallbacks.
1+
1+
1+
12+