API stands for Application Programming Interface.

AngularJS Global API

The AngularJS Global API is a set of global JavaScript functions for performing common tasks like:

• Comparing objects
• Iterating objects
• Converting data

The Global API functions are accessed using the angular object.

Below is a list of some common API functions:

API	Description
angular.lowercase()	Converts a string to lowercase
angular.uppercase()	Converts a string to uppercase
angular.isString()	Returns true if the reference is a string
angular.isNumber()	Returns true if the reference is a number

angular.lowercase()

Example

<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>

 

angular.uppercase()

Example

<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>

 

angular.isString()

Example

<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>

 

angular.isNumber()

Example

<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>