Merge branch 'master' of git://github.com/hexpm/diff

Author: RudolfMan

assets/css/app.css

@@ -163,6 +163,11 @@ input.search-input:focus {
   padding: 10px;
   border-bottom: 0.1rem solid #e1e1e1;
   cursor: pointer;
+  background: #fff;
+  position: -webkit-sticky;
+  position: sticky;
+  top: 0px;
+  z-index: 1;
 }
 
 .ghd-file-header .reveal-diff {

assets/js/app.js

@@ -50,6 +50,10 @@ fileHeaders.forEach(header => {
     parent.querySelectorAll('.ghd-diff').forEach(diff => {
       diff.classList.toggle('hidden')
     })
-    header.classList.toggle('collapsed')
+    header.classList.toggle('collapsed') && scrollIfNeeded(header)
   })
 })
+
+const scrollIfNeeded = elem => {
+  elem.getBoundingClientRect().top < 0 && elem.scrollIntoView(true)
+}