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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="https://cdn.staticfile.org/angular.js/1.6.3/angular.min.js"></script> </head> <body> <div ng-app="myApp" ng-controller="myCtrl"> <input type="text" ng-model="myInput" ng-blur="blur()"> <p>输入的内容为：{{myInput}}</p> <p>变成小写：{{ x1 }}</p> <p>变成大写：{{ x2 }}</p> <p ng-switch = "x3"> 是不是字符串： <label ng-switch-when = "true">是</label> <label ng-switch-when = "false">不是</label> <label ng-switch-when = ""></label> </p> <p ng-switch = "x4"> 是不是数字： <label ng-switch-when = "true">是</label> <label ng-switch-when = "false">不是</label> <label ng-switch-when = ""></label> </p> </div> </body> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) { $scope.blur = function(){ if($scope.myInput ==''){ $scope.myInput = undefined; } if(!isNaN($scope.myInput)){ $scope.myInput = Number($scope.myInput); } $scope.x1 = angular.lowercase($scope.myInput); $scope.x2 = angular.uppercase($scope.myInput); $scope.x3 = angular.isString($scope.myInput); $scope.x4 = angular.isNumber($scope.myInput); } }); </script>
运行结果