1.3 (#38)

* Add cover page

* Update doc

* Add kbd style, resolve #37

* headling can cliked, resolve #36

* Update change log, close #35

* Update docs

src/event.js

@@ -23,11 +23,11 @@ export function scrollActiveSidebar () {
 
   function highlight () {
     for (let i = 0, len = anchors.length; i < len; i += 1) {
-      const node = anchors[i].parentNode
+      const node = anchors[i]
       const bcr = node.getBoundingClientRect()
 
       if (bcr.top < 10 && bcr.bottom > 10) {
-        const li = nav[node.id]
+        const li = nav[node.getAttribute('data-id')]
 
         if (!li || li === active) return
         if (active) active.setAttribute('class', '')
@@ -40,9 +40,8 @@ export function scrollActiveSidebar () {
     }
   }
 
-  const dom = document.querySelector('main .content')
-  dom.removeEventListener('scroll', highlight)
-  dom.addEventListener('scroll', highlight)
+  window.removeEventListener('scroll', highlight)
+  window.addEventListener('scroll', highlight)
   highlight()
 }
 
@@ -100,3 +99,16 @@ export function scroll2Top () {
   }
   cacheContentDOM.scrollTop = 0
 }
+
+export function sticky () {
+  const dom = document.querySelector('section.cover')
+  const coverHeight = dom.getBoundingClientRect().height
+
+  return (function () {
+    if (window.pageYOffset >= coverHeight || dom.classList.contains('hidden')) {
+      document.body.classList.add('sticky')
+    } else {
+      document.body.classList.remove('sticky')
+    }
+  })()
+}