AngularJS全局API

<div ng-app="myApp" ng-controller="myCtrl">
  {{X1}}
  {{X2}}
</div>
<script>
 var app=angular.module("myApp",[]);
app.controller("myCtrl",function($scope)
{
  $scope.X1="TOM";
  $.scope.X2=angular.lowercase($scope.X1);  //输出tom

  $scope.X1="tom"
  $scope.X2=angular.uppercse($scope.X1); //输出TOM

  $scope.X1="tom";
  $scope.X2=angular.isString($scope.X1);//输出true

  $scope.X1="tom";
  $scope.X2=angular.isNumber($scope.X1);//输出false

});
</script>