Z-Index
Utility classes for setting an element's z-index level.
Classes
Set an element's z-index by using a class (.d-zi-{level}>). These classes match up with the variables names listed above. The table below lists the available z-index levels, class names, and the CSS output.
Variables
When writing Less, you can set an element's z-index by using a variable (var(--zi-{name})). The table below lists the available variables, output, and a description for when they should be used.