Improve watcher for scroll issues

pradyunsg · May 15, 2024 · 38f17af · 38f17af
1 parent 5e3440b
commit 38f17af
Showing 1 changed file with 7 additions and 4 deletions.
diff --git a/src/furo/assets/scripts/furo.js b/src/furo/assets/scripts/furo.js
@@ -5,11 +5,14 @@ import Gumshoe from "./gumshoe-patched.js";
 ////////////////////////////////////////////////////////////////////////////////
 var tocScroll = null;
 var header = null;
-var lastScrollTop = window.pageYOffset || document.documentElement.scrollTop;
+var lastScrollTop = document.documentElement.scrollTop;
 const GO_TO_TOP_OFFSET = 64;
 
-function scrollHandlerForHeader() {
-  if (Math.floor(header.getBoundingClientRect().top) == 0) {
+function scrollHandlerForHeader(positionY) {
+  const headerTop = Math.floor(header.getBoundingClientRect().top);
+
+  console.log(`headerTop: ${headerTop}`);
+  if (headerTop == 0 && positionY != headerTop) {
     header.classList.add("scrolled");
   } else {
     header.classList.remove("scrolled");
@@ -62,7 +65,7 @@ function scrollHandlerForTOC(positionY) {
 }
 
 function scrollHandler(positionY) {
-  scrollHandlerForHeader();
+  scrollHandlerForHeader(positionY);
   scrollHandlerForBackToTop(positionY);
   scrollHandlerForTOC(positionY);
 }