From 01cc9a483a5c837ec5f400cc28a42296c23efceb Mon Sep 17 00:00:00 2001
From: Erik Demaine <edemaine@mit.edu>
Date: Tue, 8 Jan 2019 10:17:43 -0500
Subject: [PATCH] Fix scrollspy on link clicking, and # for top of page

---
 assets/js/_main.js    | 7 +++++--
 assets/js/main.min.js | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/assets/js/_main.js b/assets/js/_main.js
index ab682c738e83..acfb9f53f7ce 100644
--- a/assets/js/_main.js
+++ b/assets/js/_main.js
@@ -82,7 +82,7 @@ $(document).ready(function() {
   $(window).scroll(jQuery.throttle(250, function() {
     // Don't run while smooth scrolling (from clicking on a link).
     if (smoothScrolling) return;
-    var scrollTop = $(window).scrollTop() + 20;  // 20 = offset
+    var scrollTop = $(window).scrollTop() + 20 + 1;  // 20 = offset
     var links = [];
     $("nav.toc a").each(function() {
       var link = $(this);
@@ -106,9 +106,12 @@ $(document).ready(function() {
         if (links[i].href !== location.hash) {
           history.replaceState(null, null, links[i].href);
         }
-        break;
+        return;
       }
     }
+    if ('#' !== location.hash) {
+      history.replaceState(null, null, '#');
+    }
   }));
 
   // add lightbox class to all image links
diff --git a/assets/js/main.min.js b/assets/js/main.min.js
index a8866657ad99..8446d2d9a709 100644
--- a/assets/js/main.min.js
+++ b/assets/js/main.min.js
@@ -6,4 +6,4 @@
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