AngularJS API

API stands for Application Programming Interface (Application Programming Interface).

AngularJS Global API

The AngularJS Global API is a collection of JavaScript functions for performing common tasks, such as:

• Comparing objects
• Iterating objects
• Transforming objects

Global API functions are accessed using the angular object.

Below is a list of some common API functions:

Note: The angular.lowercase and angular.uppercase methods were removed after AngularJS 1.7, replaced by angular.$$lowercase and angular.$$uppercase.

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