md

src/modules/paper-export/views/PaperTemplateBuild.vue

@@ -663,7 +663,7 @@ export default {
     },
     getElementHeight(elementId) {
       const dom = document.getElementById(elementId);
-      return dom.offsetHeight || 0;
+      return dom ? dom.offsetHeight : 0;
     },
     calcAveOptionPercent(maxPercent) {
       if (maxPercent > 0.5) return 1;