From 9b4e6669dbf454ea17ee42331487825475130d40 Mon Sep 17 00:00:00 2001
From: "qingwei.li" <cinwell.li@gmail.com>
Date: Sat, 7 Oct 2017 10:08:09 +0800
Subject: [PATCH] fix(slugify): GitHub compatible heading links, fixed #272

---
 src/core/render/slugify.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/core/render/slugify.js b/src/core/render/slugify.js
index 4b71337d5..046a06c17 100644
--- a/src/core/render/slugify.js
+++ b/src/core/render/slugify.js
@@ -1,13 +1,16 @@
 let cache = {}
 const re = /[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,.\/:;<=>?@\[\]^`{|}~]/g
 
+function lower (string) {
+  return string.toLowerCase()
+}
+
 export function slugify (str) {
   if (typeof str !== 'string') return ''
 
-  str = /^[\w\s]+$/g.test(str) ? str.toLowerCase() : str
-
   let slug = str
     .trim()
+    .replace(/[A-Z]+/g, lower)
     .replace(/<[^>\d]+>/g, '')
     .replace(re, '')
     .replace(/\s/g, '-')