1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/keyboard-lock/resources/iframe-lock-helper.html b/testing/web-platform/tests/keyboard-lock/resources/iframe-lock-helper.html
new file mode 100644
index 0000000000..3950802f8e
--- /dev/null
+++ b/testing/web-platform/tests/keyboard-lock/resources/iframe-lock-helper.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<script>
+'use strict';
+
+window.onmessage = message => {
+  if (message.data === 'Ready') {
+    let onSuccess = () => { parent.postMessage('Failure', '*'); };
+    let onError = error => {
+      if (error.name == 'InvalidStateError') {
+        parent.postMessage('Success', '*');
+      } else {
+        parent.postMessage('Failure', '*');
+      }
+    };
+
+    navigator.keyboard.lock().then(onSuccess, onError);
+  }
+};
+
+</script>