Prevented page navigation highlighting erroring

This was when no page nav was on the page

diff --git a/resources/assets/js/pages/page-show.js b/resources/assets/js/pages/page-show.js
index 8c2f0e300a7723c6349de0239a9fc8e8af600cba..6af5af57d8f979e0017f0482a41ccf141b3fe1a4 100644 (file)
--- a/resources/assets/js/pages/page-show.js
+++ b/resources/assets/js/pages/page-show.js
@@ -170,7 +170,7 @@ let setupPageShow = window.setupPageShow = function (pageId) {
       // fetch all the headings.
       let headings = document.querySelector('.page-content').querySelectorAll('h1, h2, h3, h4, h5, h6');
       // if headings are present, add observers.
-      if (headings.length > 0) {
+      if (headings.length > 0 && pageNav !== null) {
           addNavObserver(headings);
       }