# Description of the problem: * I have a web application that spans the full height of the viewport. * It needs to know the exact height of the viewport because it is a scrolling carousel of images. * Because the bottom nav collapses, the viewport is resized during scrolling, breaking the UI. * It is possible to prevent the bottom nav from collapses by setting `overflow: hidden` on the body tag, forcing a fixed viewport size. * When the smart app banner is present, however, the bottom nav will still collapse. # Repro Steps: * Use a web page with the styles `body { overflow: hidden }` and enough content in the body so that is scrolls * Verify that scrolling within the body does not cause the bottom nav to collapse * Now open the web page with a smart app banner showing * The bottom nav collapses and the viewport is resized
<rdar://problem/84688427>