<!doctype HTML><title>Backgrounds on the root element should extend to cover the entire canvas in the presence of margin and will-change: transform</title><linkrel="author"title="Philip Rogers"href="mailto:pdr@chromium.org"><linkrel="help"href="https://www.w3.org/TR/css-backgrounds-3/#root-background"><linkrel="match"href="background-margin-will-change-root-ref.html"><metaname=fuzzycontent="0-1;0-19000"><style>html{background:linear-gradient(lightblue,yellow);height:300px;margin:50px;will-change:transform;}</style>