<!DOCTYPE html><title>CSS aspect-ratio: Row flexbox main size</title><linkrel="author"title="Google LLC"href="https://www.google.com/"><linkrel="help"href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio"><linkrel="help"href="https://drafts.csswg.org/css-flexbox/#line-sizing"title="9.2.3.B"><linkrel="match"href="../../reference/ref-filled-green-100px-square.xht"/><metaname="assert"content="A stretched flex item in a definite-height single-line flex container should trigger aspect-ratio."><p>Test passes if there is a filled green square and <strong>no red</strong>.</p><divstyle="display: flex; height: 100px;"><divstyle="background: green; aspect-ratio: 1/1; min-width: 0;"></div></div>