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代码编辑器：

<!DOCTYPE html>
<meta charset="utf-8">
<link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/>
<script src="https://cdn.staticfile.org/angular.js/1.6.3/angular.min.js"></script>
<h2>AngularJS 数据验证范例</h2>

<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>

</form>
<footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
<script>
var app = angular.module('myApp', []);
app.controller('validateCtrl', function($scope) {
    $scope.user = '李白';
    $scope.email = 'li.bai@gmail.com';
});
</script>

代码编辑器：

运行结果：