Angularjs providing form validation facility, so that the user can be notified of invalid input. This provides a safer user experience, because the user receives instant feedback on how to rectify the mistake. Maintain in brain that while client-side validation plays an important part in providing a good user experience, it can easily be circumvented and thus can not be trusted. Server-side validation is still necessary for a secure application.
We need 2 files
Formvalidation.html
app.js
Formvalidation.html
<!DOCTYPE html>
<html>
<head>
<!-- CSS -->
<!-- load bootstrap -->
<link rel="stylesheet" href="css/bootstrap.min.css">
<style>
body { padding-top:30px; }
</style>
<!-- JS -->
<!-- load angular -->
<script src="js/anguler_1.2.js"></script>
<script src="js/app.js"></script>
</head>
<!-- apply angular app and controller to our body -->
<body ng-app="formValidationApp" ng-controller="formController">
<div class="container">
<div class="col-sm-8 col-sm-offset-2">
<!-- PAGE HEADER -->
<div class="page-header"><h3>AngularJS Form Validation with HTML5</h3></div>
<!-- FORM -->
<!-- novalidate is used to disable browser's native form validation -->
<form name="userForm" ng-submit="submitForm(userForm.$valid)" novalidate>
<!-- NAME -->
<div class="form-group">
<label>Name *</label>
<input type="text" name="name" class="form-control" ng-model="name" required>
<p ng-show="userForm.name.$invalid && !userForm.name.$pristine" class="help-block">You name is required.</p>
</div>
<!-- USERNAME -->
<div class="form-group">
<label>Username</label>
<input type="text" name="username" class="form-control" ng-model="user.username" ng-minlength="3" ng-maxlength="8" required>
<p ng-show="userForm.username.$error.minlength" class="help-block">Username is too short.</p>
<p ng-show="userForm.username.$error.maxlength" class="help-block">Username is too long.</p>
<p ng-show="userForm.username.$invalid && !userForm.username.$pristine" class="help-block">Please enter Username</p>
</div>
<!-- EMAIL -->
<div class="form-group">
<label>Email</label>
<input type="email" name="email" class="form-control" ng-model="email">.
<p ng-show="userForm.email.$invalid && !userForm.email.$pristine" class="help-block">Enter a valid email.</p>
</div>
<!-- SUBMIT BUTTON -->
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div><!-- col-sm-8 -->
</div><!-- /container -->
</body>
</html>
A few central stops to notice here
novalidate is used to disable browser's native form validationThe ngModel directive provides the two-way data-binding by synchronizing the model to the view, as well as view to the model
app.js
//app.js
// create angular app
var formValidationApp = angular.module('formValidationApp', []);
// create angular controller
formValidationApp.controller('formController', function($scope) {
// function to submit the form after all validation has occurred
$scope.submitForm = function(isValid) {
// check to make sure the form is completely valid
if (isValid) {
alert('our form is amazing');
} else {
alert("All values are not filled Please check")
}
};
});
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