AngularJS API
API 表示 Application Programming Interface，即应用程序接口。
AngularJS 全局 API
AngularJS 全局 API 是一组全局 JavaScript 函数，用于执行常见任务，如:
- Comparing 对象
- Iterating 对象
- Converting 数据
使用 angular 对象访问全局 API 函数。
下面是一些常见 API 函数的列表:
| API | 描述 |
|---|---|
| angular.lowercase() | 将字符串转换为小写 |
| angular.uppercase() | 将字符串转换为大写 |
| angular.isString() | 如果引用是字符串，返回 |
| angular.isNumber() | 如果引用是数字，则返回 true |
angular.lowercase()
实例
<!DOCTYPE html><html><script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script><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);});</script></body></html>
angular.uppercase()
实例
<!DOCTYPE html><html><script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script><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";$scope.x2 = angular.uppercase($scope.x1);});</script></body></html>
angular.isString()
实例
<!DOCTYPE html><html><script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script><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";$scope.x2 = angular.isString($scope.x1);});</script></body></html>
angular.isNumber()
实例
<!DOCTYPE html><html><script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script><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";$scope.x2 = angular.isNumber($scope.x1);});</script></body></html>