AngularJS 表单和控件可以提供验证功能，并对用户输入的非法数据进行警告。客户端的验证不能确保用户输入数据的安全，所以服务端的数据验证也是必须的。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>数据验证</title>
<script src="angular-1.4.1/angular.min.js"></script>
</head>
<body>
<h2>数据验证</h2>
<form ng-app="myApp" ng-controller="validateCtrl"
name="myForm" novalidate>
<p>用户名:<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.$error.required">用户名是必须的。</span>
</span>
</p>
<p>邮箱:<br>
<input type="email" name="email" ng-model="email" required>
<span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid">
<span ng-show="myForm.email.$error.required">邮箱是必须的。</span>
<span ng-show="myForm.email.$error.email">非法的邮箱。</span>
</span>
</p>
<p>
<input type="submit"
ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||
myForm.email.$dirty && myForm.email.$invalid">
</p>
</form>
<script>
var app = angular.module('myApp', []);
app.controller('validateCtrl', function($scope) {
$scope.user = 'John Doe';
$scope.email = 'john.doe@gmail.com';
});
</script>
</body>
</html>
