fixes #8, fixes #11.

Author: justinkames

Diff for: package.json

@@ -1,7 +1,7 @@
 {
   "name": "vuejs-logger",
   "author": "Justin Kames",
-  "version": "1.3.4",
+  "version": "1.3.5",
   "description": "Vuejs-logger, provides customizable logging functionality for Vue.js.",
   "main": "dist/index.js",
   "repository": {
@@ -19,12 +19,16 @@
   "babel": {
     "presets": [
       "es2015"
+    ],
+    "plugins": [
+      "transform-object-assign"
     ]
   },
   "devDependencies": {
     "babel-cli": "6.24.1",
     "babel-core": "6.25.0",
     "babel-loader": "7.1.1",
+    "babel-plugin-transform-object-assign": "6.22.0",
     "babel-preset-es2015": "6.24.1",
     "chai": "4.1.0",
     "codecov": "2.2.0",

Diff for: src/logger.js

@@ -72,6 +72,10 @@ export default (function () {
     function getMethodName () {
         let error = {}
         try { throw new Error('') } catch (e) { error = e }
+        // IE9 does not have .stack property
+        if (error.stack === undefined) {
+            return ''
+        }
         let stackTrace = error.stack.split('\n')[3]
         if (/ /.test(stackTrace)) {
             stackTrace = stackTrace.trim().split(' ')[1]