Fixed the frequent "cannot read undefined" error in console

UC-Davis-molecular-computing · Jan 27, 2024 · 1e78e1e · 1e78e1e
1 parent a0d3ac2
commit 1e78e1e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/src/util.dart b/lib/src/util.dart
@@ -1053,7 +1053,7 @@ num current_zoom(bool is_main) => is_main ? current_zoom_main_js() : current_zoo
 
 CssStyleSheet get_scadnano_stylesheet() {
   for (var stylesheet in document.styleSheets) {
-    if (stylesheet.href.contains(constants.scadnano_css_stylesheet_name)) {
+    if (stylesheet.href != null && stylesheet.href.contains(constants.scadnano_css_stylesheet_name)) {
       return stylesheet;
     }
   }