The dynamic viewport has a size that adapts to the presence or absence of dynamic toolbars. When the dynamic toolbars are expanded, the dynamic viewport is equal to the size of the small viewport. When the dynamic toolbars are retracted, the dynamic viewport is equal to the size of the large viewport.

Study Notes

The new viewports have units assigned to them: lvw, lvh, lvi, lvb, lvmin, and lvmax for the large viewport, and svw, svh, svi, svb, svmin, and svmax for the small viewport.
The sizes of these viewport-percentage units are fixed (and therefore stable) unless the viewport itself is resized.
The large viewport is sized assuming any UA interfaces that are dynamically expanded and retracted to be retracted. The small viewport is sized assuming any UA interfaces that are dynamically expanded and retracted to be expanded.
The dynamic viewport has a size that adapts to the presence or absence of dynamic toolbars. When the dynamic toolbars are expanded, the dynamic viewport is equal to the size of the small viewport. When the dynamic toolbars are retracted, the dynamic viewport is equal to the size of the large viewport.

Test your knowledge of viewport-percentage units and their behaviors with this quiz. Explore how the units lvw, lvh, lvi, lvb, lvmin, lvmax, svw, svh, svi, svb, svmin, and svmax behave in different viewport scenarios.