什么是 AngularJs 全局 API？

原文:https://www . geesforgeks . org/what-the-anglarjs-global-API/

AngularJS中的全局 API API 代表应用编程接口。它是一组用于构建软件应用程序的协议、例程和工具，允许用户与应用程序交互并执行若干任务。

在 AngularJS 中，全局 API 是一组全局 Javascript 函数，用于执行比较对象、迭代对象、转换数据等任务。

AngularJS 中的一些 API 函数如下所示:

  • angular.lowercase: This converts the string into lowercase.

    语法:

    ts angular.lowercase(string);

    例 1:

    ```ts   

        
            

    {{"Before Conversion: " + i1 }}

            

    {{"After Conversion: " + i2 }}

        
                 var app = angular.module('App', []);         app.controller('Ctrl', function($scope) {             $scope.i1 = "GeeksforGeeks";             // converting string into lowercase             $scope.i2 = angular.lowercase($scope.i1);          });     

    ```

    输出:

    ```ts Before Conversion: GeeksforGeeks
    After Conversion: geeksforgeeks

    ```

  • angular.uppercase: This converts the string into uppercase.

    语法:

    ts angular.uppercase(string);

    例 2:

    ```ts   

        
            

    {{"Before Conversion: " + i1 }}

            

    {{"After Conversion: " + i2 }}

        
                 var app = angular.module('App', []);         app.controller('Ctrl', function($scope) {             $scope.i1 = "geeksforGeeks";             // converting string into uppercase             $scope.i2 = angular.uppercase($scope.i1);          });     

    ```

    输出:

    ```ts Before Conversion: geeksforgeeks After Conversion: GEEKSFORGEEKS

    ```

  • angular.isString: This check the given value is a string or not, if the value is string then it returns true else it returns false.

    语法:

    ts angular.isString(value);

    例

    ```ts   

        
            

    {{"Value is: " + i1 }}

            

    {{"Value is string: " + i2 }}

        
                 var app = angular.module('App', []);         app.controller('Ctrl', function($scope) {             $scope.i1 = 15;             // checks whether the given value is a string             $scope.i2 = angular.isString($scope.i1);          });     

    ```

    输出:

    ```ts Value is: 15 Value is String: false

    ```

  • angular.isNumber: This checks whether the given value is number or not, if it is a number then it returns true else it returns false.

    语法:

    ts angular.isNumber(value);

    例

    ```ts   

        
            

    {{"Value is: " + i1 }}

            

    {{"Value is string: " + i2 }}

        
                 var app = angular.module('App', []);         app.controller('Ctrl', function($scope) {             $scope.i1 = 15;             // checks whether the given value is a number             $scope.i2 = angular.isNumber($scope.i1);          });     

    ```

    输出:

    ```ts Value is: 15 Value is Number: true

    ```

    AngularJS 中更多的 API 如下:

  • angular.isDate: 检查给定值是否为日期

  • angular.isArray: 检查给定的引用是否是数组
  • angular . is function:检查给定的引用是否是函数
  • angular . isobject:检查给定的引用是否是对象

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