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AngularJS API

API (Application Programming Interface) in AngularJS is a set of global JavaScript functions used for the purpose of carrying out the common tasks such as comparing objects, iterating objects, converting data. Some API functions in AngularJS are as follows :

  • Comparing objects
  • Iterating objects
  • Converting data

Some API functions in AngularJS are as follows:

1. angular.lowercase – Converts the string in lowercase.

 Syntax

angular.lowercase(string);

Example

<!DOCTYPE html>

<html>

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>

<body>

<div ng-app="intellipaatApp" ng-controller="intellipaatCtrl">

<p>{{"Before Conversion: " +i1 }}</p>

<p>{{"After Conversion: " + i2 }}</p>

</div>

<script>

var app = angular.module('intellipaatApp', []);

app.controller('intellipaatCtrl', function($scope) {

$scope.i1 = "Intellipaat";

$scope.i2 = angular.lowercase($scope.i1);  // convert string into lowercase

});

</script>

</body>

</html>

Output

Before Conversion: Intellipaat

After Conversion: intellipaat

 

2. angular.uppercase – Converts the string in uppercase.

Syntax

angular.uppercase(string);

Example

<!DOCTYPE html>

<html>

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>

<body>

<div ng-app="intellipaatApp" ng-controller="intellipaatCtrl">

<p>{{"Before Conversion: " +i1 }}</p>

<p>{{"After Conversion: " + i2 }}</p>

</div>

<script>

var app = angular.module('intellipaatApp', []);

app.controller('intellipaatCtrl', function($scope) {

$scope.i1 = "Intellipaat";

$scope.i2 = angular.uppercase($scope.i1);  // convert string into lowercase

});

</script>

</body>

</html>

Output

Before Conversion: Intellipaat

After Conversion: INTELLIPAAT

 

3. angular.isNumber() – It checks that the given value is number or not. If value is number then it returns true otherwise returns false.

Syntax

angular.isNumber(value);

Example

<!DOCTYPE html>

<html>

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>

<body>

<div ng-app="intellipaatApp" ng-controller="intellipaatCtrl">

<p>{{"Value is: " +i1 }}</p>

<p>{{"Value is number: " + i2 }}</p>

</div>

<script>

var app = angular.module('intellipaatApp', []);

app.controller('intellipaatCtrl', function($scope) {

$scope.i1 = 22;

$scope.i2 = angular.isNumber($scope.i1);  // convert string into lowercase

});

</script>

</body>

</html>

Output

Value is: 22

Value is number: true

 

4. angular.isString() – It checks that the given value is string or not. If value is string then it returns true otherwise returns false.

Syntax

angular.isString(value);

Example

<!DOCTYPE html>

<html>

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>

<body>

<div ng-app="intellipaatApp" ng-controller="intellipaatCtrl">

<p>{{"Value is: " +i1 }}</p>

<p>{{"Value is String: " + i2 }}</p>

</div>

<script>

var app = angular.module('intellipaatApp', []);

app.controller('intellipaatCtrl', function($scope) {

$scope.i1 = 22;

$scope.i2 = angular.isString($scope.i1);  // convert string into lowercase

});

</script>

</body>

</html>

 Output

Value is: 22

Value is String: false

Some more API is:

  • isDate – Determines if a value is a date.
  • isArray – Determines if a reference is anArray.
  • isFunction – Determines if a reference is aFunction.
  • isObject – Determines if a reference is aobject etc.

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