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Test Info:
<html class="reftest-wait">
<meta name="viewport" content="width=device-width minimum-scale=0.25 initial-scale=1.0">
<style>
html, body {
margin: 0;
width: 100%;
height: 100%;
scrollbar-width: none;
}
div {
position: absolute;
}
.B {
width: 200%;
height: 400%;
background: white;
}
.C {
width: 200%;
height: 200%;
background: green;
}
</style>
<div class="B"></div>
<div class="C"></div>
<script>
document.addEventListener('MozReftestInvalidate', () => {
// The page here is twice the width of the ICB, and four times the height.
// We want the layout viewport to be expanded to be twice the width and
// height of the ICB (to maintain aspect ratio), rather than four times the
// height.
// To test this, scroll to the end of the layout scroll range.
// If the layout viewport is expanded too much, we have no layout scroll
// range, so nothing will happen, and a green area will remain in view.
// If the layout viewport is expanded to the desired size, a white area
// will be scrolled into view, matching the reference page.
window.scrollTo(window.scrollMaxX, window.scrollMaxY);
document.documentElement.classList.remove('reftest-wait');
});
</script>
</html>