css/css-anchor-position/anchor-in-css-min-max-function.html

<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-pos">
<link rel="author" href="mailto:kiet.ho@apple.com">
<link rel="match" href="reference/anchor-in-css-min-max-function-ref.html">

<style>
.container {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  gap: 10px;
}

.box {
  width: 100px;
  height: 100px;
}

.green {
  background-color: green;
}

.red {
  background-color: red;
}

#anchor1 {
  anchor-name: --anchor1;
}

#anchor2 {
  anchor-name: --anchor2;
}

#anchor3 {
  anchor-name: --anchor3;
}

#target-fail {
  position: relative;
  left: 300px;
}

#target {
  position: absolute;
  top: min(anchor(--anchor1 bottom), anchor(--anchor2 bottom), anchor(--anchor3 top));
  left: max(anchor(--anchor1 left), anchor(--anchor2 left), anchor(--anchor3 left));
  z-index: 1;
}
</style>

<p>The test passes if there are three green boxes with no red.</p>

<div class="container">
  <!-- These boxes are 100px by 100px and sits next to each other in a row.
  First two boxes are green and last box is red -->
  <div class="box green" id="anchor1"></div>
  <div class="box green" id="anchor2"></div>
  <div class="box red" id="anchor3"></div>
</div>

<!-- If min()/max() works correctly, this green box should completely
cover the red box. -->
<div class="box green" id="target"></div>