Merge pull request #241 from desmosinc/dont-prepend-to-empty-fragment

Don't attempt to prepend to an empty DOMFragment.
desmosinc · Mar 6, 2022 · aab6ed2 · aab6ed2
2 parents 60d51cc + 0851bc2
commit aab6ed2
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/services/mouse.ts b/src/services/mouse.ts
@@ -112,8 +112,9 @@ class Controller_mouse extends Controller_latex {
     };
 
     if (ctrlr.blurred) {
-      if (!ctrlr.editable)
-        domFrag(rootElement || undefined).prepend(domFrag(textareaSpan));
+      if (rootElement && !ctrlr.editable) {
+        domFrag(rootElement).prepend(domFrag(textareaSpan));
+      }
       textarea.focus();
       // focus call may bubble to clients, who may then write to
       // mathquill, triggering cancelSelectionOnEdit. If that happens, we