layout/style/test/test_user_sheet_shadow_dom.html

   1 <!DOCTYPE HTML>
   2 <title>Test for bug 1576229 - Nodes in Shadow DOM react properly to dynamic changes in user sheets</title>
   3 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   4 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   5 <div></div>
   6 <span id="host" style="display: block"></span>
   7 <script>
   8 const gIOService = SpecialPowers.Cc["@mozilla.org/network/io-service;1"]
   9   .getService(SpecialPowers.Ci.nsIIOService)
  10
  11 const gSSService = SpecialPowers.Cc["@mozilla.org/content/style-sheet-service;1"]
  12   .getService(SpecialPowers.Ci.nsIStyleSheetService);
  13
  14 const windowUtils = SpecialPowers.getDOMWindowUtils(window);
  15
  16 function loadUserSheet(style) {
  17   const uri = gIOService.newURI("data:text/css," + style);
  18   windowUtils.loadSheet(uri, windowUtils.USER_SHEET);
  19 }
  20
  21 SimpleTest.waitForExplicitFinish();
  22
  23 onload = function() {
  24   loadUserSheet(`
  25     div {
  26       width: 100px;
  27       height: 100px;
  28       background-color: red;
  29     }
  30     .foo {
  31       background-color: green;
  32     }
  33   `);
  34   let host = document.querySelector("#host");
  35   host.attachShadow({ mode: "open" }).innerHTML = `
  36     <div></div>
  37   `;
  38   let light = document.querySelector('div');
  39   let shadow = host.shadowRoot.querySelector('div');
  40   is(getComputedStyle(light).backgroundColor, "rgb(255, 0, 0)", "User sheet works in light DOM");
  41   is(getComputedStyle(shadow).backgroundColor, "rgb(255, 0, 0)", "User sheet works in shadow DOM");
  42   light.classList.add("foo");
  43   shadow.classList.add("foo");
  44   is(getComputedStyle(light).backgroundColor, "rgb(0, 128, 0)", "Dynamic change for user sheet works in light DOM");
  45   is(getComputedStyle(shadow).backgroundColor, "rgb(0, 128, 0)", "Dynamic change for user sheet works in shadow DOM");
  46   SimpleTest.finish();
  47 }
  48 </script>