fix(utils): Update vanilla JS require loader to be fully ES5 (#98)

Author: marcovdb

spec/utils.spec.js

@@ -58,13 +58,13 @@ describe('Utils', function() {
 
     it('should return an asynchronous require loadChildren statement with vanilla javascript', function() {
       var result = [
-        'loadChildren: () => new Promise(function (resolve, reject) {',
+        'loadChildren: function () { return new Promise(function (resolve, reject) {',
         '  require.ensure([], function (require) {',
         '    resolve(' + getRequireString(path, name) + ');',
         '  }, function () {',
         '    reject({ loadChunkError: true });',
         '  }, \'name\');',  
-        '})'
+        '})}'
       ];
       getRequireLoader('path', 'name', 'name', true, true).should.eql(result.join(''));
     });

src/utils.js

@@ -21,13 +21,13 @@ module.exports.getRequireLoader = function(filePath, chunkName, moduleName, inli
   var requireString = module.exports.getRequireString(filePath, moduleName);
 
   var result = [
-    'loadChildren: () => new Promise(function (resolve, reject) {',
+    'loadChildren: '+ (isJs ? 'function () { return' : '() =>') + ' new Promise(function (resolve, reject) {',
     '  ' + (isJs ? 'require' : '(require as any)') + '.ensure([], function (' + (isJs ? 'require' : 'require: any') + ') {',
     '    resolve(' + requireString + ');',
     '  }, function () {',
     '    reject({ loadChunkError: true });',
     '  }' + module.exports.getChunkName('require', chunkName) + ');',
-    '})'
+    '})' + (isJs ? '}' : '')
   ];
 
   return inline ? result.join('') : result.join('\n');