<!DOCTYPE html><linkrel="match"href="grid-template-propagation-ref.html"><linkrel="help"href="https://bugs.chromium.org/p/chromium/issues/detail?id=1222988"><linkrel="help"href="https://html.spec.whatwg.org/C/#anonymous-fieldset-content-box"><style>fieldset{display:grid;grid-template:auto/1fr;grid-template-areas:"a";width:100px;height:100px;margin:0;border:none;padding:0;}</style><p>There should be a green box below.</p><fieldset><divstyle="background: green; grid-area: a"></div></fieldset>