Send metric only during loading event

js/editor-libs/perf.js

@@ -1,41 +1,38 @@
-(function() {
-    'use strict';
+'use strict';
 
-    /**
-     * Posts a name to set as a mark to Kuma for
-     * processing and beaconing to GA
-     * @param {Object} perf - The performance object sent to Kuma
-     */
-    function postToKuma(perf) {
-        window.parent.postMessage(perf, 'https://developer.mozilla.org');
-    }
+/**
+ * Posts a name to set as a mark to Kuma for
+ * processing and beaconing to GA
+ * @param {Object} perf - The performance object sent to Kuma
+ */
+function postToKuma(perf) {
+    window.parent.postMessage(perf, 'https://developer.mozilla.org');
+}
+
+postToKuma({ markName: 'interactive-editor-loading' });
 
-    /**
-     * Posts marks to set on the Kuma side, based on certain
-     * events during document loading. These will then be made
-     * available in performance tools, and beaconed to GA
-     */
-    document.addEventListener('readystatechange', function(event) {
-        switch (event.target.readyState) {
-        case 'loading':
-            postToKuma({ markName: 'interactive-editor-loading' });
-            break;
-        case 'interactive':
-            postToKuma({
-                markName: 'interactive-editor-interactive',
-                measureName: 'ie-time-to-interactive',
-                startMark: 'interactive-editor-loading',
-                endMark: 'interactive-editor-interactive'
-            });
-            break;
-        case 'complete':
-            postToKuma({
-                markName: 'interactive-editor-complete',
-                measureName: 'ie-time-to-complete',
-                startMark: 'interactive-editor-loading',
-                endMark: 'interactive-editor-complete'
-            });
-            break;
-        }
-    });
-})();
+/**
+ * Posts marks to set on the Kuma side, based on certain
+ * events during document loading. These will then be made
+ * available in performance tools, and beaconed to GA
+ */
+document.addEventListener('readystatechange', function(event) {
+    switch (event.target.readyState) {
+    case 'interactive':
+        postToKuma({
+            markName: 'interactive-editor-interactive',
+            measureName: 'ie-time-to-interactive',
+            startMark: 'interactive-editor-loading',
+            endMark: 'interactive-editor-interactive'
+        });
+        break;
+    case 'complete':
+        postToKuma({
+            markName: 'interactive-editor-complete',
+            measureName: 'ie-time-to-complete',
+            startMark: 'interactive-editor-loading',
+            endMark: 'interactive-editor-complete'
+        });
+        break;
+    }
+});