Merge pull request 'fix' (#223) from annzee/JCC-RIP:cetc into master

public/index.html

@@ -4,7 +4,8 @@
     <meta charset="utf-8">
     <!-- <meta http-equiv="X-UA-Compatible" content="IE=edge"> -->
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
-    <% if (htmlWebpackPlugin.options.cdn.length) { %>
+    <% if (htmlWebpackPlugin.options.cdn &&
+    htmlWebpackPlugin.options.cdn.css) { %>
     <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
     <% } %>
     <link rel="icon" href="<%= BASE_URL %>favicon.ico">
@@ -14,7 +15,7 @@
     htmlWebpackPlugin.options.cdn.css) { %>
     <link rel="stylesheet" href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" />
     <% } %>
-
+    
     <!-- 使用CDN的JS文件 -->
     <% for (var i in htmlWebpackPlugin.options.cdn &&
     htmlWebpackPlugin.options.cdn.js) { %>