Description
API is nothing but Application Programming Interface. AngularJS API possess various global JavaScript functions that can perform certain tasks like:
- Looping objects
- Objects Comparison
- Data Conversion
angular object. These functions can carry out low level JavaScript operations.
| API | Description |
|---|---|
angular.lowercase() |
This API function changes a string to lowercase. |
angular.uppercase() |
This API function changes a string to uppercase. |
angular.isArray() |
This API function returns True if the reference is an array otherwise returns false. |
angular.isFunction() |
This API function returns True if the reference is a array |
angular.isString() |
This API function returns True if the reference is a string |
angular.isNumber() |
This API function returns True if the reference is a number |
For more details on Angular API functions and the design philosophy, check the Angular API page from the Developer Guide
Examples
Here is an AngularJS API example:
[html]
<!DOCTYPE html>
<html>
<head>
<title>AngularJS API</title>
<script data-require="angular.js@1.3.14" data-semver="1.3.14" src="https://code.angularjs.org/1.3.14/angular.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>
<script src="App.js"></script>
<script src="Controller.js"></script>
</head>
<body>
<h1>AngularJS API</h1>
<div ng-app="spApp" ng-controller="SPController">
<p>Default : {{ x1 }}</p>
<p>lowercase : {{ x2 }}</p>
<p>uppercase : {{ x3 }}</p>
<p>isArray : {{ x4 }}</p>
<p>isFunction : {{ x5 }}</p>
<p>isString : {{ x6 }}</p>
<p>isNumber : {{ x7 }}</p>
</div>
</body>
</html>
[/html]
[javascript]
var app = angular.module('spApp', []);
app.controller('SPController', function($scope) {
$scope.x1 = "Smith Watson";
$scope.x2 = angular.lowercase($scope.x1);
$scope.x3 = angular.uppercase($scope.x1);
$scope.x4 = angular.isArray($scope.x1);
$scope.x5 = angular.isFunction($scope.x1);
$scope.x6 = angular.isString($scope.x1);
$scope.x7 = angular.isNumber($scope.x1);
});
[/javascript]
Output:
Key Points
- lowercase(), uppercase(), isArray(), isFunction(), isString() and isNumber() are the various API functions.