AngularJS model
ng-model directive is used to bind application data to HTML controller (input, select, textarea).
ng-model Directive
ng-model The directive binds the value of an input field to a variable created by AngularJS.
Instance
<!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) {
$scope.name = "John Doe";
});
</script>
<p>使用 ng-model 指令来绑定输入域的值到控制器的属性。</p>
</body>
</html>Run instance»
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Two-way binding
Two-way binding, when the value of the input field is modified, the value of the AngularJS attribute will also be modified:
Example
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
名字: <input ng-model="name">
<h1>你输入了: {{name}}</h1>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.name = "John Doe";
});
</script>
<p>修改输入框的值，标题的名字也会相应修改。</p>
</body>
</html>Run Instance»
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Verify user input
Instance
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script> </head> <body> <form ng-app="" name="myForm"> Email: <input type="email" name="myAddress" ng-model="text"> <span ng-show="myForm.myAddress.$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>
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In the above instance , the prompt information will be displayed when the ng-show attribute returns true.
Application status
ng-model The directive can provide status values (invalid,
dirty, touched, error):
Instance
<!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@php.cn'">
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>Run Instance»
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CSS Classes
ng-model directive provides CSS classes for HTML elements based on their state:
Example
<!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>Run instance»
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##ng The -model directive adds/removes the following classes based on the state of the form field:
- ng-empty
- ng-not-empty
- ng-touched
- ng-untouched
- ng-valid
- ng-invalid
- ng-dirty
- ng-pending
- ng-pristine
