chromium/third_party/blink/web_tests/external/wpt/css/css-conditional/container-queries/inline-size-bfc-floats.html

<!doctype html>
<title>CSS Container Queries Test: inline-size constrained by floats - layout moving forwards</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#size-container">
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#containment-inline-size">
<link rel="match" href="inline-size-bfc-floats-ref.html">
<style>
  .float { float: left; background-color: blue; }
  .right { float: right; }

  #outer { width: 400px; }
  #float1 { width: 200px; height: 150px; }
  #float2 { width: 250px; height: 100px; }
  #float3 { width: 300px; height: 100px; }

  #container { container-type: inline-size; }

  /* Initially, text + 200px of red content (#content1 + #content2) is too tall
     to make #container fit by #float1 */
  .content { height: 100px; background-color: red; }

  /* Trying to fit #container beside #float2 causes the width to remove
     #content1. text + 100px of red content (#content2) is too tall to fit
     beside #float2. It would at this point fit beside #float1, but that would
     cause the width to increase again, and the spec says layout always moves
     forward. */
  @container (width < 200px) {
    #content1 { display: none }
  }

  /* Trying to fit #container beside #float3 causes the rest of the red content
     (#content2) to disappear. */
  @container (width < 150px) {
    #content2 { display: none }
  }
</style>
<p>You should see the text "no red" to the left of the third float and no red.</p>
<div id="outer">
  <div id="float1" class="float right"></div>
  <div id="float2" class="float left"></div>
  <div id="float3" class="float right"></div>

  <div id="container">
    No red
    <div id="content1" class="content"></div>
    <div id="content2" class="content"></div>
  </div>
</div>