AngularJS ng-model 指令
ng-model 指令用於綁定應用程式數據到 HTML 控制器(input, select, textarea)的值。
ng-model 指令
ng-model
指令可以將輸入域的值與 AngularJS 創建的變數綁定。
AngularJS 實例
<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) {
$scope.name = "John Doe";
});
</script>
名字: <input ng-model="name">
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.name = "John Doe";
});
</script>
雙向綁定
雙向綁定,在修改輸入域的值時, AngularJS 屬性的值也將修改:
AngularJS 實例
<div ng-app="myApp" ng-controller="myCtrl">
名字: <input ng-model="name">
<h1>你輸入了: {{name}}</h1>
</div>
名字: <input ng-model="name">
<h1>你輸入了: {{name}}</h1>
</div>
驗證用戶輸入
AngularJS 實例
<form ng-app="" name="myForm">
Email:
<input type="email" name="myAddress" ng-model="text">
<span ng-show="myForm.myAddress.$error.email">不是一個合法的郵箱地址</span>
</form>
Email:
<input type="email" name="myAddress" ng-model="text">
<span ng-show="myForm.myAddress.$error.email">不是一個合法的郵箱地址</span>
</form>
以上實例中,提示資訊會在 ng-show
屬性返回 true
的情況下顯示。
應用狀態
ng-model
指令可以為應用數據提供狀態值(invalid,
dirty, touched, error):
AngularJS 實例
<form ng-app="" name="myForm" ng-init="myText = 'test@xuhuhu.com'">
Email:
<input type="email" name="myAddress" ng-model="myText" required></p>
<h1>狀態</h1>
{{myForm.myAddress.$valid}}
{{myForm.myAddress.$dirty}}
{{myForm.myAddress.$touched}}
</form>
Email:
<input type="email" name="myAddress" ng-model="myText" required></p>
<h1>狀態</h1>
{{myForm.myAddress.$valid}}
{{myForm.myAddress.$dirty}}
{{myForm.myAddress.$touched}}
</form>
CSS 類
ng-model
指令基於它們的狀態為 HTML 元素提供了 CSS 類:
AngularJS 實例
<style>
input.ng-invalid {
background-color: lightblue;
}
background-color: lightblue;
}
</style>
<body>
<form ng-app="" name="myForm">
輸入你的名字:
<input name="myAddress" ng-model="text" required>
</form>
<body>
<form ng-app="" name="myForm">
輸入你的名字:
<input name="myAddress" ng-model="text" required>
</form>
ng-model
指令根據表單域的狀態添加/移除以下類:
- ng-empty
- ng-not-empty
- ng-touched
- ng-untouched
- ng-valid
- ng-invalid
- ng-dirty
- ng-pending
- ng-pristine