support tree-shaking

jschyz · jschyz · commit 9a8c04caa0fd · 2017-01-17T15:25:52.000+08:00
diff --git a/package.json b/package.json
@@ -69,7 +69,8 @@
   "babel": {
     "presets": [
       [
-        "es2015"
+        "es2015",
+        { "modules": false }
       ]
     ]
   },
