javascript - Ionic angularjs change returned null of $scope value? -

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my html 

<input ng-model="query" ng-change="change(text)" type="text" placeholder="search">

my js

  $scope.query = null;   $scope.change = function() {     console.log($scope.query); // null?     $timeout(function() {       $http.get('example.com/' + $scope.query          ).then(function(result){             $scope.tracks = result.data.items;            });       }, 1000);   }

why $scope.query got null within change function?


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