fix: Update anchor position

Resolves #257

Author: oodamien

src/js/02-on-this-page.js

@@ -69,7 +69,7 @@
 
   function onScroll () {
     var scrolledBy = window.pageYOffset
-    var buffer = getNumericStyleVal(document.documentElement, 'fontSize') * 1.15
+    var buffer = getNumericStyleVal(document.documentElement, 'fontSize') * 1.15 + 80
     var ceil = article.offsetTop
     if (scrolledBy && window.innerHeight + scrolledBy + 2 >= document.documentElement.scrollHeight) {
       lastActiveFragment = Array.isArray(lastActiveFragment) ? lastActiveFragment : Array(lastActiveFragment || 0)

src/js/03-fragment-jumper.js

@@ -18,7 +18,7 @@
       window.location.hash = '#' + this.id
       e.preventDefault()
     }
-    window.scrollTo(0, computePosition(this, 0) - toolbar.getBoundingClientRect().bottom - 10)
+    window.scrollTo(0, computePosition(this, 0) - toolbar.getBoundingClientRect().bottom - 80)
   }
 
   window.addEventListener('load', function jumpOnLoad (e) {