fix(demo): Deploy issue (#3951)

extensions/cornerstone/src/utils/initViewTiming.ts

@@ -1,13 +1,7 @@
-import { log, Types } from '@ohif/core';
+import { log, Enums } from '@ohif/core';
 import { EVENTS } from '@cornerstonejs/core';
 
-const { TimingEnum } = Types;
-
-const IMAGE_TIMING_KEYS = [
-  TimingEnum.DISPLAY_SETS_TO_ALL_IMAGES,
-  TimingEnum.DISPLAY_SETS_TO_FIRST_IMAGE,
-  TimingEnum.STUDY_TO_FIRST_IMAGE,
-];
+const IMAGE_TIMING_KEYS = [];
 
 const imageTiming = {
   viewportsWaiting: 0,
@@ -23,6 +17,18 @@ const imageTiming = {
  */
 
 export default function initViewTiming({ element }) {
+  if (!IMAGE_TIMING_KEYS.length) {
+    // Work around a bug in WebPack that doesn't getting the enums initialized
+    // quite fast enough to be declared statically.
+    const { TimingEnum } = Enums;
+
+    IMAGE_TIMING_KEYS.push(
+      TimingEnum.DISPLAY_SETS_TO_ALL_IMAGES,
+      TimingEnum.DISPLAY_SETS_TO_FIRST_IMAGE,
+      TimingEnum.STUDY_TO_FIRST_IMAGE,
+    );
+  }
+
   if (!IMAGE_TIMING_KEYS.find(key => log.timingKeys[key])) {
     return;
   }
@@ -34,6 +40,7 @@ function imageRenderedListener(evt) {
   if (evt.detail.viewportStatus === 'preRender') {
     return;
   }
+  const { TimingEnum } = Enums;
   log.timeEnd(TimingEnum.DISPLAY_SETS_TO_FIRST_IMAGE);
   log.timeEnd(TimingEnum.STUDY_TO_FIRST_IMAGE);
   log.timeEnd(TimingEnum.SCRIPT_TO_VIEW);