Z-index

Use our low-level z-index utilities to quickly change the stack level of an element or component.

Example

Use z-index utilities to stack elements on top of one another. Requires a position value other than static, which can be set with custom styles or using our position utilities.

We call these “low-level” z-index utilities because of their default values of -1 through 3, which we use for the layout of overlapping components. High-level z-index values are used for overlay components like modals and tooltips.

z-3

z-2

z-1

z-0

z-n1

CODE

html

<div style="height: 11rem; position: relative;">
  <div class="z-3 position-absolute text-bg-primary border p-1 pt-5 ps-5 rounded-3">z-3</div>
  <div class="z-2 position-absolute text-bg-primary border p-1 pt-5 ps-5 rounded-3" style="top: 1.5rem; left: 1.5rem;">z-2</div>
  <div class="z-1 position-absolute text-bg-primary border p-1 pt-5 ps-5 rounded-3" style="top: 3rem; left: 3rem;">z-1</div>
  <div class="z-0 position-absolute text-bg-primary border p-1 pt-5 ps-5 rounded-3" style="top: 4.5rem; left: 4.5rem;">z-0</div>
  <div class="z-n1 position-absolute text-bg-primary border p-1 pt-5 ps-5 rounded-3" style="top: 6rem; left: 6rem;">z-n1</div>
</div>

Overlays

overlay components—dropdown, modal, offcanvas, popover, toast, snackbar and tooltip—all have their own z-index values to ensure a usable experience with competing “layers” of an interface.

Component approach

On some components, we use our low-level z-index values to manage repeating elements that overlap one another (like buttons in a button group or items in a list group).

Theme Builder

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