what is a z index in css
#nav {
position: fixed;
...
z-index: 2;
}
#main {
position: absolute;
...
z-index: 1;
}
3.71
7
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).
Default value: auto
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