1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resource-timing/resources/get-resourceID.js b/testing/web-platform/tests/resource-timing/resources/get-resourceID.js
new file mode 100644
index 0000000000..3fe499226a
--- /dev/null
+++ b/testing/web-platform/tests/resource-timing/resources/get-resourceID.js
@@ -0,0 +1,30 @@
+function getResourceID(resourceName) {
+  return new Promise((resolve) => {
+    const observer = new PerformanceObserver((list) => {
+      const entries = list.getEntriesByType("resource");
+      for (const entry of entries) {
+        if (entry.name.endsWith(resourceName)) {
+          observer.disconnect();
+          resolve(`${entry.name}/${entry.startTime}`);
+          return;
+        }
+      }
+    });
+    observer.observe({ entryTypes: ["resource"] });
+  });
+}
+
+function getDocumentResourceID() {
+  return new Promise((resolve) => {
+    const observer = new PerformanceObserver((list) => {
+      const entries = list.getEntriesByType("navigation");
+      if (entries.length > 0) {
+        observer.disconnect();
+        const [entry] = entries;
+        const { name, startTime } = entry;
+        resolve(`${name}/${startTime}`);
+      }
+    });
+    observer.observe({ entryTypes: ["navigation"] });
+  });
+}