docs: Don't render the table of contents on the print page

changelog.d/12340.doc

@@ -0,0 +1 @@
+Fix rendering of the documentation site when using the 'print' feature.

docs/website_files/table-of-contents.js

@@ -75,6 +75,20 @@ function setTocEntry() {
  * Populate sidebar on load
  */
 window.addEventListener('load', () => {
+ // Prevent rendering the table of contents of the "print book" page, as it
+ // will end up being rendered into the output (in a broken-looking way)
+
+ // Get the name of the current page (i.e. 'print.html')
+ const pageNameExtension = window.location.pathname.split('/').pop();
+
+ // Split off the extension (as '.../print' is also a valid page name), which
+ // should result in 'print'
+ const pageName = pageNameExtension.split('.')[0];
+ if (pageName === "print") {
+ // Don't render the table of contents on this page
+ return;
+ }
+
  // Only create table of contents if there is more than one header on the page
  if (headers.length <= 1) {
  return;