Angularjs Validation


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Angularjs Validation

An AngularJS forms and input control can validate input data. It is 100% JavaScript so AngularJS are also use for client side validation.

Example of AngularJS for client side validation

Example

<!DOCTYPE html>
<html>

<head>
<script src= "http://ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.min.js"></script>
</head>
    
<body>
<h2>Client side Validation Example</h2>

<form ng-app="" ng-controller="ajvalidater" 
name="myForm" novalidate>

<p>Username:<br>
<input type="text" name="user" ng-model="user" required>
<span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid">
<span ng-show="myForm.user.$error.required">Username is required.</span>
</span>
</p>

<p>Email:<br>
<input type="email" name="email" ng-model="email" required>
<span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid">
<span ng-show="myForm.email.$error.required">Email is required.</span>
<span ng-show="myForm.email.$error.email">Invalid email address.</span>
</span>
</p>

<p>
<input type="submit"
ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||  
myForm.email.$dirty && myForm.email.$invalid">
</p>

</form>

<script>
function ajvalidater($scope) {
    $scope.user = 'Harry Porter';
    $scope.email = 'h.porter@gmail.com';
}
</script>

</body>
</html>

Output

Username:
Username is required.

Email:
Email is required. Invalid email address.

Note: The HTML form attribute novalidate is used to disable default browser validation.


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