X-Git-Url: https://git.yukkurigames.com/?p=pwl6.git;a=blobdiff_plain;f=src%2Fyuu%2Fcore.js;h=d34d2016010253b77c199701306fb3240d9e1fd4;hp=e770f863847fd857c6a8255b6fac3131b74b9257;hb=aa8706d89dbbe734eff625e5b3d68626b27fd909;hpb=2854030a3f699188676f19ba16a5400c4976f23c

diff --git a/src/yuu/core.js b/src/yuu/core.js
index e770f86..d34d201 100644
--- a/src/yuu/core.js
+++ b/src/yuu/core.js
@@ -7,17 +7,12 @@
 (function (yuu) {
     "use strict";
 
-    yuu.isSafari = function (ua) {
-        return /^((?!chrome).)*safari/i.test(ua || navigator.userAgent)
-            || navigator.standalone;
-    };
-
     yuu.require = function (m) {
         try { return require(m); }
         catch (exc) { return null; }
     };
 
-    if (!Math.sign)
+    if (!Object.assign)
         require("./pre");
 
     var yT = this.yT || require("./yT");