Joris-van-der-Wel · April 27, 2016 18:01
diff --git a/inline-event-handler-no-browsing-context.html b/inline-event-handler-no-browsing-context.html
 <!doctype html>
 <meta charset="utf-8">
 <title>Handling of inline event handlers without a browsing context</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <body>
 <script>
 var fired;

 test(function() {
  // This document has no browsing context:
  var doc = document.implementation.createHTMLDocument('');
  var e = doc.createElement("div");

  e.setAttribute("onclick", "fired = true");
  assert_equals(e.onclick, null, "event handler should return null");
  assert_equals(e.onclick, null, "event handler should still return null");
  fired = false;
  e.dispatchEvent(new Event("click"));
  assert_equals(fired, false, "the event handler should have no effect");
 });

 test(function() {
  var doc = document.implementation.createHTMLDocument('');
  var e = doc.createElement("div");

  e.setAttribute("onclick", "fired = true");
  assert_equals(e.onclick, null, "event handler should be null");
  assert_equals(e.onclick, null, "event handler should should remain null");
  document.adoptNode(e);
  assert_equals(typeof e.onclick, 'function', "the event handler should be compiled properly after adopting into a document with a window");
  doc.adoptNode(e);
  assert_equals(typeof e.onclick, 'function', "the compiled event handler should not be unset during adoption");
 });

 test(function() {
  var doc = document.implementation.createHTMLDocument('');
  var e = doc.createElement("div");

  var f = function() { fired = true; };
  e.onclick = f;
  assert_equals(e.onclick, f, "event handler should be equal to the function just set");
  e.setAttribute("onclick", "fired = true");
  assert_equals(e.onclick, null, "the previous event handler should have been overwritten"); // (but getting it returns null because we have no browsing context)
  assert_equals(e.onclick, null, "the event handler should remain null");
  fired = false;
  e.dispatchEvent(new Event("click"));
  assert_equals(fired, false, "the event handler should have no effect");
 });

 test(function() {
  // the <body> has special behaviour for event handlers (the handlers are also set on the window)

  var doc = document.implementation.createHTMLDocument('');
  var e = doc.body;

  var f = function() { fired = true; };
  e.onscroll = f;
  assert_equals(e.onscroll, f, "event handler should be equal to the function just set");
  e.setAttribute("onscroll", "fired = true");
  assert_equals(e.onscroll, null, "the previous event handler should have been overwritten by null");
  assert_equals(e.onscroll, null, "the event handler should remain null");
  fired = false;
  e.dispatchEvent(new Event("scroll"));
  assert_equals(fired, false, "the event handler should have no effect");
 });

 </script>
 </body>