AngularJS IsUndefined Function

AngularJS isUndefined function is used to identify if a reference is undefined or not. This function return true if reference is undefined.

Syntax

angular.isUndefined(value);

AngularJS IsUndefined Function Example

<!DOCTYPE html>
<html ng-app="">  
<head>  <!-- www.techstrikers.com -->
<title>My first AngularJS code</title>  
<script SRC="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js">  
</script>  
  
</head>  
<body bgcolor="#bnde45">
<fieldset>
<legend>AngularJS IsUndefined Function</legend>
<script>  

var sourceObj1;
var str = "www.techstrikers.com";  
  
document.write(angular.isUndefined(sourceObj1));    
document.write("</br>");  
document.write(angular.isUndefined(str));   
  
</script>
</fieldset>
</body>  
</html>

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AngularJS IsUndefined Function Example

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