<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>API</title>
<script src="angular-1.4.1/angular.min.js"></script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<p>{{x1}}</p>
<p>{{x2}}</p>
</div>
<script>
var app = angular.module('myApp',[]);
app.controller('myCtrl', function ($scope) {
$scope.x1 = 'JOHN';
// $scope.x2 = angular.lowercase($scope.x1); //输出john uppercase为转大写
// $scope.x2 = angular.isString($scope.x1); //输出true
$scope.x2 = angular.isNumber($scope.x1); //输出false
});
</script>
</body>
</html>