From f997280ab1e39de8c4a66689402cffaec2658d90 Mon Sep 17 00:00:00 2001
From: "qingwei.li" <cinwell.li@gmail.com>
Date: Thu, 12 Jan 2017 19:46:28 +0800
Subject: [PATCH] Fix sticky sidebar

---
 src/event.js  | 6 +++---
 src/render.js | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/event.js b/src/event.js
index 6e9fd143..1e178b49 100644
--- a/src/event.js
+++ b/src/event.js
@@ -119,11 +119,11 @@ export function scroll2Top (offset = 0) {
 }
 
 export function sticky () {
-  const dom = document.querySelector('section.cover')
-  const coverHeight = dom.getBoundingClientRect().height
+  sticky.dom = sticky.dom || document.querySelector('section.cover')
+  const coverHeight = sticky.dom.getBoundingClientRect().height
 
   return (function () {
-    if (window.pageYOffset >= coverHeight || dom.classList.contains('hidden')) {
+    if (window.pageYOffset >= coverHeight || sticky.dom.classList.contains('hidden')) {
       document.body.classList.add('sticky')
       sticky.noSticky = false
     } else {
diff --git a/src/render.js b/src/render.js
index 9afd2d5c..cc5348cb 100644
--- a/src/render.js
+++ b/src/render.js
@@ -154,7 +154,7 @@ export function renderCover (content) {
     return
   }
   renderCover.dom.classList.add('show')
-  if (renderCover.rendered) return
+  if (renderCover.rendered) return event.sticky()
 
   // render cover
   let html = markdown(content)