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：
<input ng-model="object.xxx">
<span ng-bind="object.xxx"></span>
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>
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