diff --git a/src/static/js/caretPosition.js b/src/static/js/caretPosition.js
index 077fe58fc..03af77f33 100644
--- a/src/static/js/caretPosition.js
+++ b/src/static/js/caretPosition.js
@@ -195,7 +195,7 @@ const getSelectionRange = () => {
     return;
   }
   const selection = window.getSelection();
-  if (selection.rangeCount > 0) {
+  if (selection && selection.type !== 'None' && selection.rangeCount > 0) {
     return selection.getRangeAt(0);
   } else {
     return null;