<!DOCTYPE html><html><title>View transitions: writing mode on a container (ref)</title><linkrel="help"href="https://drafts.csswg.org/css-view-transitions-1/"><linkrel="author"href="mailto:vmpstr@chromium.org"><style>#target{background:lightblue;height:100%;aspect-ratio:1/1;}#container{width:100px;height:50px;border:1pxsolidblack;}body{writing-mode:vertical-lr;background:pink;}</style><divid=container><divid=target></div></div>