AngularJS 全局 API 用法

AngularJS 全局 API 用于执行常见任务的 JavaScript 函数集合，如：

比较对象
迭代对象
转换对象
全局 API 函数使用 angular 对象进行访问。

angular.lowercase()
实例
<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 = "RUNOOB";
$scope.x2 = angular.$$lowercase($scope.x1);
});
</script>

angular.uppercase()
实例
<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 = "runoob";
$scope.x2 = angular.$$uppercase($scope.x1);
});
</script>

angular.isString()
实例
<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 = "RUNOOB";
$scope.x2 = angular.isString($scope.x1);
});
</script>

angular.isNumber()
实例
<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 = "RUNOOB";
$scope.x2 = angular.isNumber($scope.x1);
});
</script>

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