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position-fallback-grid-001.html
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position-fallback-grid-001.html
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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-pos">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback">
<link rel="help" href="https://drafts.csswg.org/css-grid/#abspos-items">
<link rel="author" href="mailto:kojii@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<style>
.cb {
position: relative;
}
.grid {
display: grid;
grid-template-columns: repeat(4, 100px);
grid-template-rows: 50px 100px 50px 50px;
}
.item {
background: lightgray;
}
.spacer {
background: yellow;
}
.anchor1 {
anchor-name: --a1;
background: orange;
margin-left: 15px;
width: 20px;
height: 30px;
}
.target {
grid-column: 2 / 4;
grid-row: 2 / 4;
position: absolute;
position-fallback: --fallback1;
width: 100px;
height: 100px;
background: lime;
opacity: .2;
}
@position-fallback --fallback1 {
@try { /* Position to the left of the anchor. */
right: anchor(--a1 left);
top: anchor(--a1 top);
}
@try { /* Position to the right of the anchor with the wider width than CB. */
left: anchor(--a1 right);
top: anchor(--a1 top);
width: 250px;
}
@try { /* Position to the right of the anchor. This entry should succeed. */
left: anchor(--a1 right);
top: anchor(--a1 top);
}
@try { /* Zero-sized, the last entry wins if none succeeded. */
left: 0;
top: 0;
width: 0;
height: 0;
}
}
</style>
<body onload="checkLayout('.target')">
<div>
<div class="spacer" style="height: 10px"></div>
<div class="grid cb">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
<div class="item">4</div>
<div class="item">5</div>
<div class="item">
<div class="spacer" style="height: 20px"></div>
<div class="anchor1"></div>
</div>
<div class="item">7</div>
<div class="item">8</div>
<div class="item">9</div>
<div class="item">10</div>
<div class="item">11</div>
<div class="item">12</div>
<div class="item">13</div>
<div class="item">14</div>
<div class="item">15</div>
<div class="item">16</div>
<div class="target"
data-offset-x=135 data-offset-y=70
data-expected-height=100></div>
</div>
</div>
</body>