Angular中ng-bind和ng-model的区别实例详解

时间:2020-05-15 人气:0

ng-bind和ng-model的区别

AngularJS的数据绑定有ng-bind和ng-model，一般用于如下：

ng-bind是单向绑定，由作用于$scope到view层，且在HTML控件(HTML控件有：input、select、button和textarea)中不可显示。

ng-model是双向绑定，$scope<--->view层。

{{}}用于显示数据。

完整代码

<!DOCTYPE html> 
<html> 
<meta charset="utf-8"> 
<head> 
<style> 
div textarea{ 
 background-color:yellow; 
} 
</style> 
<script src="https://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js"></script> 
</head> 
<body ng-app="myNoteApp"> 
<div class="aa" ng-controller="myNoteCtrl"> 
<h2>我的笔记</h2> 
<p> 
<textarea ng-model="message" rows="10" cols="20" maxlength="100"> 
</textarea> 
</p> 
<p> 
<button ng-click="save()">保存</button> 
<button ng-click="clear()">清除</button> 
</p> 
<p>Number of characters left: <span ng-bind="left()"></span></p> 
<p>Number of characters left(method2): <span>{{leftvar}}</span></p> 
</div> 
<script> 
var app = angular.module("myNoteApp",[]); 
app.controller("myNoteCtrl",function($scope){ 
  $scope.message = ""; 
  $scope.leftvar = 0; 
  $scope.left = function() {$scope.leftvar = 100 - $scope.message.length;return $scope.leftvar;}; 
  $scope.clear = function() {$scope.message = "";}; 
  $scope.save = function() {alert("Note Saved");}; 
}); 
</script> 
</body> 
</html>

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

加载全部内容