ng-model 指令用于绑定应用程序数据到 HTML 控制器(input, select, textarea)的值
ng-model 指令可以将输入域的值与 AngularJS 创建的变量绑定。
就是用来和HTML里面的表单元素绑定。比如 input select 等等
基本绑定示例：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
名字: <input ng-model="name">
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function ($scope) {
$scope.name = "John Doe";
});
</script>
</body>
</html>Code language: HTML, XML (xml)双向绑定，在修改输入域的值时， AngularJS 属性的值也将修改：
<body>
<div ng-app="myApp" ng-controller="myCtrl">
名字: <input ng-model="name">
<h1>你输入了: {{name}}</h1>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function ($scope) {
$scope.name = "John Doe";
});
</script>
</body>Code language: HTML, XML (xml)验证用户输入：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<form ng-app="" name="myForm">
Email:
<input type="email" name="myAddress" ng-model="text">
<span ng-show="myForm.myAddress.$error.email">不是一个合法的邮箱地址</span>
</form>
</body>
</html>Code language: HTML, XML (xml)应用状态
ng-model 指令可以为应用数据提供状态值(invalid, dirty, touched, error):
<body>
<form ng-app="" name="myForm" ng-init="myText = 'test@runoob.com'">
Email:
<input type="email" name="myAddress" ng-model="myText" required>
<h1>状态</h1>
{{myForm.myAddress.$valid}}
{{myForm.myAddress.$dirty}}
{{myForm.myAddress.$touched}}
</form>
</body>Code language: HTML, XML (xml)CSS 类
ng-model 指令基于它们的状态为 HTML 元素提供了 CSS 类：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
<style>
input.ng-invalid {
background-color: orangered;
}
</style>
</head>
<body>
<form ng-app="" name="myForm">
输入你的名字:
<input name="myAddress" ng-model="text" required>
</form>
</body>
</html>Code language: HTML, XML (xml)