chore: add user agent sniffing for Edge browser

Author: Narretz

src/.eslintrc.json

@@ -9,6 +9,7 @@
     /* angular.js */
     "angular": false,
     "msie": false,
+    "edge": false,
     "jqLite": false,
     "jQuery": false,
     "slice": false,

src/Angular.js

@@ -4,6 +4,7 @@
 /* exported
   angular,
   msie,
+  edge,
   jqLite,
   jQuery,
   slice,
@@ -234,6 +235,7 @@ if ('i' !== 'I'.toLowerCase()) {
 
 var
     msie,             // holds major version number for IE, or NaN if UA is not IE.
+    edge,             // true if Microsoft Edge browser. Holds no version number.
     jqLite,           // delay binding since jQuery could be loaded after us.
     jQuery,           // delay binding
     slice             = [].slice,
@@ -255,6 +257,7 @@ var
  */
 msie = window.document.documentMode;
 
+edge = window.navigator.userAgent.indexOf('Edge') > -1;
 
 /**
  * @private

test/.eslintrc.json

@@ -28,6 +28,7 @@
     "minErrConfig": false,
     "errorHandlingConfig": false,
     "msie": false,
+    "edge": false,
     "jqLite": false,
     "jQuery": false,
     "slice": false,