css/css-flexbox/gap-collapse-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reftest Reference: gaps adjacent to a collapsed flex item are not counted</title>
<style>
  .flex {
    display: flex;
    gap: 50px;
    outline: 1px solid purple;
  }

  .intrinsic {
    width: 250px;
  }

  .flex > div {
    width: 50px;
    height: 50px;
    background: blue;
  }
</style>

<div class="flex"><div></div><div></div><div></div></div>
<div class="flex"><div></div><div></div><div></div></div>
<div class="flex"><div></div><div></div><div></div></div>
<div class="flex intrinsic"><div></div><div></div><div></div></div>
<div class="flex intrinsic"><div></div><div></div><div></div></div>
<div class="flex intrinsic"><div></div><div></div><div></div></div>