AngularJS providers more attributes to help programer can validate form and controls in form easy. A form is valid when all of control in it to be valid.
The first we need to know about below property of angularjs:
$dirty: It means that user has interacted with the field.
$valid: It means that the field content is valid.
$invalid: It means that the field content is invalid.
$pristine: It means that user has not interacted with the field yet.
Ok follow this sample.
<html>
<head>
<title>Angular JS Model</title>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
<script>
var app = angular.module('myWebApp', []);
app.controller('validateCtrl', function($scope) {
$scope.id = '112';
$scope.username = 'Lewis';
$scope.email = 'Lewis@gmail.com';
});
</script>
<style>
.red {
padding: 20px;
background-color: red;
color: #FFF;
}
.my-input {
-webkit-transition: all linear 0.5s;
transition: all linear 0.5s;
background: transparent;
}
.my-input.ng-invalid {
color: white;
background: red;
}
</style>
</head>
<body ng-app="MyForm">
<h2>Validation Example</h2>
<form ng-app="myWebApp" ng-controller="validateCtrl"
name="mywebForm">
<p>ID:<br>
<input type="text" name="id" ng-model="id" ng-class="my-input" required >
<span ng-class="red" ng-show="myForm.id.$dirty && myForm.id.$invalid">
<span ng-show="myForm.id.$error.required">ID is required.</span>
</span>
</p>
<p>Username:<br>
<input type="text" name="user" ng-model="username" ng-class="my-input" required>
<span ng-class="red" ng-show="myForm.user.$dirty && myForm.user.$invalid">
<span ng-show="myForm.user.$error.required">Username is required.</span>
</span>
</p>
<p>Email:<br>
<input type="email" name="email" ng-model="email" ng-class="my-input" required>
<span ng-class="red" ng-show="myForm.email.$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" value="Submit">
</p>
</body>
</html>
You can change something on this sample to know how it works. That is a good way to learn.
Thanks for sharing valuable information. Your blogs were helpful...
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