web-platform-tests · chromium-wpt-export-bot · Jan 6, 2026 · Jan 6, 2026
diff --git a/lint.ignore b/lint.ignore
@@ -415,6 +415,7 @@ SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/c
 SET TIMEOUT: html/webappapis/timers/*
 SET TIMEOUT: portals/history/resources/portal-harness.js
 SET TIMEOUT: requestidlecallback/deadline-after-expired-timer.html
+SET TIMEOUT: resource-timing/tentative/initiator-url/set-timeout.html
 SET TIMEOUT: resources/*
 SET TIMEOUT: scheduler/tentative/current-task-signal-async-abort.any.js
 SET TIMEOUT: scheduler/tentative/current-task-signal-async-priority.any.js

diff --git a/resource-timing/resources/iframe-post-message.html b/resource-timing/resources/iframe-post-message.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<html>
+  <script>
+    window.addEventListener('message', e => {
+      const port = e.ports?.[0];
+      port.postMessage("hello from iframe");
+    });
+  </script>
+</html>
diff --git a/resource-timing/resources/loading-resource-lib.js b/resource-timing/resources/loading-resource-lib.js
@@ -0,0 +1,9 @@
+// This js file actually calls fetch to load an image to
+// an element.
+async function load_image(label, img_element) {
+  const url = "/images/blue.png?"+label;
+  const response = await fetch(url);
+  blob = await response.blob();
+  const imgURL = URL.createObjectURL(blob);
+  img_element.src = imgURL;
+}
diff --git a/resource-timing/resources/loading-resources-in-posted-task.js b/resource-timing/resources/loading-resources-in-posted-task.js
@@ -0,0 +1,29 @@
+function load_resources() {
+  //Fetching the Stylesheet
+  var link = document.createElement("link");
+  link.rel = "stylesheet";
+  link.href = "resources/empty_style.css?no_cache";
+  link.id = "link_id";
+  document.head.appendChild(link);
+
+  // Fetching an image
+  var img = document.createElement("img");
+  img.src = "/images/blue.png?no_cache";
+  img.alt = "Sample Image for testing initiator Attribute";
+  img.id = "img_id"
+  document.body.appendChild(img);
+
+  // Inserting a script element
+  var script = document.createElement("script");
+  script.src = "resources/empty.js?no_cache";
+  script.id = "script_id"
+  document.body.appendChild(script);
+
+  //Inserting a html document in an iframe
+  var iframe = document.createElement("iframe");
+  iframe.src = "resources/green.html?no_cache";
+  iframe.id = "iframe_id";
+  document.body.appendChild(iframe);
+}
+
+scheduler.postTask(load_resources);
diff --git a/...urce-timing/resources/loadingResources.js → ...rce-timing/resources/loading-resources.js b/...urce-timing/resources/loadingResources.js → ...rce-timing/resources/loading-resources.js
@@ -1,21 +1,25 @@
 //Fetching the Stylesheet
 var link = document.createElement("link");
 link.rel = "stylesheet";
-link.href = "../resources/empty_style.css";
+link.href = "resources/empty_style.css?no_cache";
+link.id = "link_id";
 document.head.appendChild(link);
 
 // Fetching an image
 var img = document.createElement("img");
-img.src = "/images/blue.png";
+img.src = "/images/blue.png?no_cache";
 img.alt = "Sample Image for testing initiator Attribute";
+img.id = "img_id"
 document.body.appendChild(img);
 
-//Inserting a html document in an iframe
-var iframe = document.createElement("iframe");
-iframe.src = "../resources/green.html";
-document.body.appendChild(iframe);
-
 // Inserting a script element
 var script = document.createElement("script");
-script.src = "../resources/empty.js";
+script.src = "resources/empty.js?no_cache";
+script.id = "script_id"
 document.body.appendChild(script);
+
+//Inserting a html document in an iframe
+var iframe = document.createElement("iframe");
+iframe.src = "resources/green.html?no_cache";
+iframe.id = "iframe_id";
+document.body.appendChild(iframe);
diff --git a/resource-timing/tentative/initiator-url/event-handler.html b/resource-timing/tentative/initiator-url/event-handler.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+  <script src="../../resources/loading-resource-lib.js"></script>
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for a resource fetched via event handler,
+      the initiator_url points to script that sets up the event handler.
+  </p>
+</body>
+<script>
+
+  var img = document.createElement("img");
+  document.body.appendChild(img);
+
+  const frame = document.createElement("iframe");
+  frame.addEventListener("load", () => {
+    load_image(label, img);
+  });
+  frame.src = "../resources/green.html";
+  document.body.appendChild(frame);
+
+
+  const label = "initiator_url_eventhandler";
+  const resource = "/images/blue.png?"+label;
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/event-handler.html";
+
+  initiator_url_test(resource, expectedInitiatorUrl, resource +
+    " initiatorUrl from event handlers", resource + " timeout");
+</script>
diff --git a/resource-timing/tentative/initiator-url/external-script-in-posted-task.html b/resource-timing/tentative/initiator-url/external-script-in-posted-task.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+</head>
+<body>
+  <script src="../../resources/loading-resources-in-posted-task.js"></script>
+
+  <h1>Description</h1>
+  <p> This test loads a number of resources in the loading-resources.js via scheduler.postTask()
+      and verifies that `iniatitor_url`s in ResourceTiming are expected.
+  </p>
+</body>
+<script>
+
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] + "/resource-timing/resources/loading-resources-in-posted-task.js";
+  const resources = [
+     "empty_style.css?no_cache",
+     "blue.png?no_cache",
+     "empty.js?no_cache",
+     "green.html?no_cache",
+  ];
+  for (const resource of resources) {
+      initiator_url_test(resource, expectedInitiatorUrl, resource +
+        " initiatorUrl by scheduler.postTask() from external scripts", resource + " timeout");
+  }
+</script>
diff --git a/resource-timing/tentative/initiator-url/external-script.html b/resource-timing/tentative/initiator-url/external-script.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+</head>
+<body>
+  <script src="../../resources/loading-resources.js"></script>
+
+  <h1>Description</h1>
+  <p> This test loads a number of resources in the loading-resources.js and
+      verifies that `iniatitor_url`s in ResourceTiming entries are as expected.
+  </p>
+</body>
+<script>
+
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] + "/resource-timing/resources/loading-resources.js";
+  const resources = [
+     "empty_style.css?no_cache",
+     "blue.png?no_cache",
+     "empty.js?no_cache",
+     "green.html?no_cache",
+  ];
+  for (const resource of resources) {
+      initiator_url_test(resource, expectedInitiatorUrl, resource +
+        " initiatorUrl from external scripts", resource + " timeout");
+  }
+</script>
diff --git a/resource-timing/tentative/initiator-url/iframe-post-message.html b/resource-timing/tentative/initiator-url/iframe-post-message.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+  <script src="../../resources/loading-resource-lib.js"></script>
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for a resource fetched via message handler,
+      the initiator_url points to script that sends the message.
+  </p>
+</body>
+<script>
+
+  const channel = new MessageChannel();
+  const frame = document.createElement("iframe");
+  frame.addEventListener("load", () => {
+    frame.contentWindow.postMessage("port", "*", [channel.port2]);
+  });
+  frame.src = "../../resources/iframe-post-message.html";
+  document.body.appendChild(frame);
+
+  var img = document.createElement("img");
+  document.body.appendChild(img);
+
+  const label = "initiator_url_iframe_postmessage";
+  const resource = "/images/blue.png?"+label;
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/iframe-post-message.html";
+
+  channel.port1.onmessage = e => {
+     load_image(label, img);
+  }
+
+ initiator_url_test(resource, expectedInitiatorUrl, resource +
+   " initiatorUrl from iframe postMessage()", resource + " timeout");
+
+</script>
diff --git a/resource-timing/tentative/initiator-url/inline-document-write.html b/resource-timing/tentative/initiator-url/inline-document-write.html
@@ -17,8 +17,8 @@
     document.write('<link id="css_written" rel="stylesheet" href="../resources/empty_style.css?inline-script-doc-write">');
     document.write('<script id="script_written" src="../resources/empty.js?doc-write"><\/script>');
 
-    const host_info = get_host_info();
-    const expectedInitiatorUrl = host_info["ORIGIN"] +
+    const hostInfo = get_host_info();
+    const expectedInitiatorUrl = hostInfo["ORIGIN"] +
       "/resource-timing/tentative/initiator-url/inline-document-write.html";
 
     const resources = [

diff --git a/resource-timing/tentative/initiator-url/inline-script.html b/resource-timing/tentative/initiator-url/inline-script.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for resources including an
+      iframe, that are loaded by an inline script, the
+      initiatorUrl is properly reported.
+  </p>
+</body>
+<script>
+
+  const label = "no_cache_inline_script";
+
+  var ifr = document.createElement("iframe");
+  document.body.appendChild(ifr);
+  ifr.src = "resources/blank_page_green.html?" + label;
+
+  const link = document.createElement("link");
+  link.rel = "stylesheet";
+  link.href = "../../resources/empty_style.css?" + label;
+  document.head.appendChild(link);
+
+  const img = document.createElement("img");
+  img.src = "/images/blue.png?" + label;
+  document.body.appendChild(img);
+
+  const resources = [
+    "blank_page_green.html?" + label,
+    "empty_style.css?" + label,
+    "blue.png?" + label,
+  ];
+
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/inline-script.html";
+
+  for (const resource of resources) {
+    initiator_url_test(resource, expectedInitiatorUrl, resource+
+      " initiatorUrl from inline-script", resource+" timeout");
+  }
+
+</script>
diff --git a/resource-timing/tentative/initiator-url/post-task.html b/resource-timing/tentative/initiator-url/post-task.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+  <script src="../../resources/loading-resource-lib.js"></script>
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for a resource fetched with a postTask,
+      the initiator_url points to the async caller script,
+      instead of the callee script.
+  </p>
+</body>
+<script>
+  var img = document.createElement("img");
+  document.body.appendChild(img);
+
+  const label = "initiator_url_posttask";
+  const resource = "/images/blue.png?"+label;
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/post-task.html";
+  scheduler.postTask(function() {load_image(label, img)});
+
+  initiator_url_test(resource, expectedInitiatorUrl, resource+
+    " initiatorUrl from postTask()", resource + " timeout");
+
+</script>
diff --git a/resource-timing/tentative/initiator-url/promise.html b/resource-timing/tentative/initiator-url/promise.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+  <script src="../../resources/loading-resource-lib.js"></script>
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for a resource fetched with a Promise,
+      the initiator_url points to the async caller script,
+      instead of the callee script.
+  </p>
+</body>
+<script>
+  var img = document.createElement("img");
+  document.body.appendChild(img);
+
+  const label = "initiator_url_promise";
+  const resource = "/images/blue.png?"+label;
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/promise.html";
+  const instant_promise = Promise.resolve();
+  instant_promise.then( function() {load_image(label, img)} );
+
+  initiator_url_test(resource, expectedInitiatorUrl, resource +
+    " initiatorUrl from fullfilled promise", resource + " timeout");
+
+</script>
diff --git a/resource-timing/tentative/initiator-url/queue-microtask.html b/resource-timing/tentative/initiator-url/queue-microtask.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/get-host-info.sub.js"></script>
+  <script src="../../resources/test-initiator.js"></script>
+
+  <script src="../../resources/loading-resource-lib.js"></script>
+</head>
+<body>
+  <h1>Description</h1>
+  <p> This test verifies that, for a resource fetched with a queueMicrotask,
+      the initiator_url points to the async caller script,
+      instead of the callee script.
+  </p>
+</body>
+<script>
+  var img = document.createElement("img");
+  document.body.appendChild(img);
+
+  const label = "initiator_url_queuemicrotask";
+  const resource = "/images/blue.png?"+label;
+  const hostInfo = get_host_info();
+  const expectedInitiatorUrl = hostInfo["ORIGIN"] +
+    "/resource-timing/tentative/initiator-url/queue-microtask.html";
+  queueMicrotask( function() {load_image(label, img)} );
+
+  initiator_url_test(resource, expectedInitiatorUrl, resource +
+    " initiatorUrl from queueMicrotask()", resource + " timeout");
+</script>