AngularJS 模型
ng-model 指令将HTML 控制器(input, select, textarea)的值 和 应用程序数据进行绑定。
ng-model 指令
ng-model 指令可以将输入域的值与 AngularJS 创建的变量绑定。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/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) {
$scope.name = "John Doe";
});
</script> <p>使用 ng-model 指令来绑定输入域的值到控制器的属性。</p> </body>
</html>
aaarticlea/png;base64,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" alt="" />
双向绑定
双向绑定，在修改输入域的值时， AngularJS 属性的值也将修改。
可以看到，它是实时同步更新的。input中每输入一个字，它就立刻同步到数据模型，这是因为每次输入input，都会触发一个input的事件。然后 angular就会执行的$digest循环，直到模型稳定下来。我们不用手动设置任何事件监听来同步更新视图和模型，这样很赞，这就是angular的目的。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<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) {
$scope.name = "John Doe";
});
</script> <p>修改输入框的值，标题的名字也会相应修改。</p> </body>
</html>
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验证用户输入
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body> <form ng-app="" name="myForm">
Email:
<input type="email" name="myAddress" ng-model="text">//此处ng-model不能为空
<span ng-show="myForm.myAddress.$error.email">不是一个合法的邮箱地址</span>
</form> <p>在输入框中输入你的邮箱地址，如果不是一个合法的邮箱地址，会弹出提示信息。</p> </body>
</html>
aaarticlea/png;base64,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" alt="" />
以上实例中，提示信息会在 ng-show 属性返回 true 的情况下显示。
应用状态
ng-model 指令可以为应用数据提供状态值(invalid, dirty, touched, error):
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body> <form ng-app="" name="myForm" ng-init="myText = 'test@runoob.com'"> Email:
<input type="email" name="myAddress" ng-model="myText" required>
<p>编辑邮箱地址，查看状态的改变。</p>
<h1>状态</h1>
<p>Valid: {{myForm.myAddress.$valid}} (如果输入的值是合法的则为 true)。</p>
<p>Dirty: {{myForm.myAddress.$dirty}} (如果值改变则为 true)。</p>
<p>Touched: {{myForm.myAddress.$touched}} (如果通过触屏点击则为 true)。</p> </form> </body>
</html>
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" alt="" />
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="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
<style>
input.ng-invalid {
background-color: lightblue;
}
</style>
</head>
<body> <form ng-app="" name="myForm">
输入你的名字:
<input name="myName" ng-model="myText" required>
</form> <p>编辑文本域，不同状态背景颜色会发送变化。</p>
<p>文本域添加了 required 属性，该值是必须的，如果为空则是不合法的。</p> </body>
</html>
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ng-model 指令根据表单域的状态添加/移除以下类：
- ng-empty
- ng-not-empty
- ng-touched
- ng-untouched
- ng-valid
- ng-invalid
- ng-dirty
- ng-pending
- ng-pristine
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