April 28, 2015 08:15 by
Peter
In this tutorial, I will tell you about how to checkout some utility methods that returns BOOLEAN values on call. In AngularJS you can find many utility method like isObject, isString, isDefined, etc to check the type of the input.
All these method has similar signature like isXxxxx(). In the following code, will show you some utility methods that are present inside the angular object.
<!DOCTYPE html>
<html ng-app="myApp">
<head>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script> <meta charset="utf-8">
<title> How to Checkout Utility Methods on AngularJS? </title>
</head>
<body ng-controller="MyController" ng-cloak>
<h3>angular.isArray : {{isArray}}</h3>
<h3>angular.isDate: {{isDate}}</h3>
<h3>angular.isDefined : {{isDefined}}</h3>
<h3>angular.isElement : {{isElement}}</h3>
<h3>angular.isFunction : {{isFunction}}</h3>
<h3>angular.isNumber : {{isNumber}}</h3>
<h3>angular.isObject : {{isObject}}</h3>
<h3>angular.isString : {{isString}}</h3>
<h3>angular.isUndefined : {{isUndefined}}</h3>
<script>
var myApp = angular.module("myApp", []);
myApp.controller("MyController", ["$scope",
function($scope) {
var fruitList = ["Apple", "Orange"];
$scope.isArray = angular.isArray(fruitList);
$scope.isDate = angular.isDate(new Date());
$scope.isDefined = angular.isDefined(fruitList);
$scope.isElement = angular.isElement("Hello");
$scope.isFunction = angular.isFunction(new Date().getFullYear);
$scope.isNumber = angular.isNumber(5);
$scope.isObject = angular.isObject({});
$scope.isString = angular.isString("Peter");
$scope.isUndefined = angular.isUndefined(null); } ]); </script>
</body>
</html>
And here is the output from the above code:
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