testing/web-platform/tests/css/css-view-transitions/no-crash-set-exception.html

   1 <!DOCTYPE html>
   2 <html>
   3 <title>Shared transitions: author styles ignored during prepare</title>
   4 <link rel="help" href="https://github.com/WICG/view-transitions">
   5 <link rel="author" href="mailto:khushalsagar@chromium.org">
   6
   7 <script src="/resources/testharness.js"></script>
   8 <script src="/resources/testharnessreport.js"></script>
   9
  10 <style>
  11 div {
  12   width: 100px;
  13   height: 100px;
  14   background: blue;
  15   contain: paint;
  16   view-transition-name: shared;
  17 }
  18
  19 html::view-transition,
  20 html::view-transition-group(shared),
  21 html::view-transition-image-pair(shared),
  22 html::view-transition-old(shared),
  23 html::view-transition-new(shared) {
  24   background: blue;
  25 }
  26 </style>
  27
  28 <div></div>
  29
  30 <script>
  31 function validate_background(pseudoString) {
  32   return window.getComputedStyle(document.documentElement, pseudoString).style.background != 'blue';
  33 }
  34
  35 promise_test(async t => {
  36   assert_implements(document.startViewTransition, "Missing document.startViewTransition");
  37   return new Promise((resolve, reject) => {
  38     document.startViewTransition(() => {
  39       resolve();
  40       throw 'error';
  41     });
  42   });
  43 }, "An exception thrown during a transition shouldn't crash.");
  44
  45 </script>