Only active mode toggling if bs is present (no error if not present)!

Author: dragonstyle

src/resources/formats/html/templates/quarto-html.ejs

@@ -17,7 +17,10 @@ window.document.addEventListener("DOMContentLoaded", function (event) {
   }
 
   const toggleBodyColorPrimary = () => {
-    toggleBodyColorMode(window.document.querySelector("link#quarto-bootstrap"));
+    const bsSheetEl = window.document.querySelector("link#quarto-bootstrap");
+    if (bsSheetEl) {
+      toggleBodyColorMode(bsSheetEl);
+    }
   }
 
   toggleBodyColorPrimary();