[WPT] BFCache eligibility: BroadcastChannel

When there are open BroadcastChannels at the time of navigation, Chrome: The page is not BFCached. The page is BFCached if BroadcastChannels are closed in the pagehide event. Firefox: The page is BFCached. Safari: BroadcastChannel is not supported. Bug: 1107415 Change-Id: I25afa41274278b0976ad1fa0fdd50015a3f6ce77
web-platform-tests · Oct 19, 2021 · d6af167 · d6af167
1 parent 679cfd4
commit d6af167
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/html/browsers/browsing-the-web/back-forward-cache/eligibility/broadcast-channel.html b/html/browsers/browsing-the-web/back-forward-cache/eligibility/broadcast-channel.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="../resources/helper.sub.js"></script>
+<script>
+// Check whether the page is BFCached when there are open BroadcastChannels.
+runEventTest(
+  {funcBeforeNavigation: () => {
+      window.bc = new BroadcastChannel('foo');
+  }},
+  'Eligibility (BroadcastChannel)');
+
+// Same as above, but the BroadcastChannels are closed in the pagehide event.
+runEventTest(
+  {funcBeforeNavigation: () => {
+      window.bc = new BroadcastChannel('foo');
+      window.addEventListener('pagehide', () => window.bc.close());
+  }},
+  'Eligibility (BroadcastChannel closed in the pagehide event)');
+</script>