1 files changed, 25 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/dynamic-import/delay-load-event.html b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/dynamic-import/delay-load-event.html
new file mode 100644
index 0000000000..5ec6433e65
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/dynamic-import/delay-load-event.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<title>Dynamic imports don't delay the load event</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+// Dynamic imports don't #delay-the-load-event.
+// Therefore, Window load event would be fired
+// just after the dynamic import() below starts.
+window.loaded = [];
+window.addEventListener('load', () => loaded.push('Window load event'));
+promise_test(t => {
+  loaded.push('import start');
+  // This 'loading' log is added to detect the previous Chromium behavior
+  // where the Window load event is delayed until just before script
+  // element's load event.
+  t.step_timeout(() => loaded.push('loading'), 1000);
+  return import("../resources/slow-module.js?pipe=trickle(d2)")
+    .then(() => {
+        assert_array_equals(
+            loaded,
+            ['import start', 'Window load event', 'loading', 'slow'],
+            "Window load event shouldn't be delayed by dynamic imports");
+      });
+}, "Dynamic imports don't delay the load event.");
+</script>