testing/web-platform/tests/css/css-backgrounds/background-attachment-fixed-block-002.html


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<!DOCTYPE html>

 <html class="reftest-wait">

  <meta charset="UTF-8">

  <title>CSS Backgrounds and Borders Test: 'background-attachment: fixed' applied on a block element</title>

  <!--

  Created: November 25th 2023

  Last modified: December 17th 2023

  -->

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#background-attachment">
  <link rel="help" href="https://www.w3.org/TR/cssom-view-1/#dom-window-scroll">
  <link rel="match" href="reference/background-attachment-fixed-block-002-ref.html">
  <link rel="stylesheet" type="text/css" href="/fonts/ahem.css">

  <meta name="assert" content="This test checks the interaction between a block element with a 'background-attachment: fixed' background-image and the expected behavior of the scroll() method which applies to the viewport window.">

  <style>
  body
    {
      color: transparent;
      font-family: Ahem;
      font-size: 50vh;
      height: 50vh;
      line-height: 2;
      margin: 0px;
    }

  div#test-passed
    {
      background-attachment: fixed;
      background-image: linear-gradient(to bottom, blue 25%, orange 25% 50%, lime 50% 75%, purple 75% 100%);
    }
  </style>

  <script>

  document.documentElement.addEventListener("TestRendered", () => {
    window.scroll(0, document.body.offsetHeight);
    document.documentElement.classList.remove('reftest-wait');
  });

  </script>

  <div>F</div>

  <!--
  Having more than 1 character may trigger
  unneedlessly an horizontal scrollbar
  -->

  <div id="test-passed">P</div>