add runOutsideOfCurrentZone just like runOutsideOfAngular

lib/zone.ts

@@ -257,6 +257,13 @@ interface ZoneType {
    * Verify that Zone has been correctly patched. Specifically that Promise is zone aware.
    */
   assertZonePatched();
+
+  /**
+   * Run function outside current zone, instead it will run under rootZone.
+   */
+  runOutsideOfCurrentZone<T>(
+      callback: Function, applyThis?: any, applyArgs?: any, source?: string, runGuarded?: boolean,
+      zoneSpec?: ZoneSpec): T;
 }
 
 /**
@@ -564,6 +571,27 @@ const Zone: ZoneType = (function(global: any) {
       }
     }
 
+    static get rootZone(): AmbientZone {
+      let zone = Zone.current;
+      while (zone.parent) {
+        zone = zone.parent;
+      }
+      return zone;
+    }
+
+    static runOutsideOfCurrentZone(
+        callback: Function, applyThis?: any, applyArgs?: any, source?: string,
+        runGuarded: boolean = true, zoneSpec?: ZoneSpec) {
+      let zone = Zone.rootZone;
+      if (zoneSpec) {
+        zone = zone.fork(zoneSpec);
+      }
+      if (runGuarded) {
+        return zone.runGuarded(callback, applyThis, applyArgs, source);
+      } else {
+        return zone.run(callback, applyThis, applyArgs, source);
+      }
+    }
 
     static get current(): AmbientZone {
       return _currentZoneFrame.zone;

test/common/zone.spec.ts

@@ -83,6 +83,24 @@ describe('Zone', function() {
     });
   });
 
+  describe('run out side of current zone', function() {
+    it('should be able to get run under rootZone', function() {
+      Zone.current.fork({name: 'testZone'}).run(function() {
+        Zone.runOutsideOfCurrentZone(() => {
+          expect(Zone.current.name).toEqual('<root>');
+        });
+      });
+    });
+
+    it('should be able to get run outside of current zone', function() {
+      Zone.current.fork({name: 'testZone'}).run(function() {
+        Zone.runOutsideOfCurrentZone(() => {
+          expect(Zone.current.name).toEqual('newTestZone');
+          expect(Zone.current.parent.name).toEqual('<root>');
+        }, null, null, null, true, {name: 'newTestZone'});
+      });
+    });
+  });
 
   describe('get', function() {
     it('should store properties', function() {