AngularJS ng-model 指令
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
ng-model 指令可以将输入域的值与 AngularJS 创建的变量绑定。
AngularJS 实例
 
          < 
          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 >
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:
AngularJS 实例
 
          < 
          div 
          ng-app= 
          "myApp" 
          ng-controller= 
          "myCtrl" 
          > 
          
名字: < input ng-model= "name" >
< h1 >你输入了: {{name}} < /h1 >
< /div >
 
         
 
         名字: < input ng-model= "name" >
< h1 >你输入了: {{name}} < /h1 >
< /div >
验证用户输入
AngularJS 实例
 
          < 
          form 
          ng-app= 
          "" 
          name= 
          "myForm" 
          > 
          
Email:
< input type= "email" name= "myAddress" ng-model= "text" >
< span ng-show= "myForm.myAddress.$error.email" >不是一个合法的邮箱地址 < /span >
< /form >
 
         
 
         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 >
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):
AngularJS 实例
 
          < 
          form 
          ng-app= 
          "" 
          name= 
          "myForm" 
          ng-init= 
          "myText = 'test@cxyjc.cn'" 
          > 
          
Email:
< input type= "email" name= "myAddress" ng-model= "myText" required > < /p >
< h1 >状态 < /h1 >
{{myForm.myAddress.$valid}}
{{myForm.myAddress.$dirty}}
{{myForm.myAddress.$touched}}
< /form >
 
         
 
         Email:
< input type= "email" name= "myAddress" ng-model= "myText" required > < /p >
< h1 >状态 < /h1 >
{{myForm.myAddress.$valid}}
{{myForm.myAddress.$dirty}}
{{myForm.myAddress.$touched}}
< /form >
CSS 类
ng-model 指令基于它们的状态为 HTML 元素提供了 CSS 类:
AngularJS 实例
 
           < 
           style 
           > 
           
 
          
 
           
           input.ng-invalid { 
           
background-color: lightblue;
}
 
          
 
          background-color: lightblue;
}
 
           < 
           /style 
           > 
           
< body >
 
           
< form ng-app= "" name= "myForm" >
输入你的名字:
< input name= "myAddress" ng-model= "text" required >
< /form >
 
          
 
         < body >
< form ng-app= "" name= "myForm" >
输入你的名字:
< input name= "myAddress" ng-model= "text" required >
< /form >
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