message: [bugfix] ImagePreview: index NaN
diff: @@ -20,7 +20,7 @@ const initInstance = () => {
  document.body.appendChild(instance.$el);
  };
  -const ImagePreview = (images, startPosition) => {
  +const ImagePreview = (images, startPosition = 0) => {
  /* istanbul ignore if */
  if (isServer) {
  return;
  