angular中ng-bind和ng-model的區別
阿新 • • 發佈：2019-01-03
ng-bind和ng-model的區別
AngularJS的資料繫結有ng-bind和ng-model，一般用於如下：
<input ng-model="object.xxx">
<span ng-bind="object.xxx"></span>
AngularJS的資料繫結有ng-bind和ng-model，一般用於如下：
<input ng-model="object.xxx">
<span ng-bind="object.xxx"></span>
ng-bind是單向繫結，由作用於$scope到view層，且在HTML控制元件(HTML控制元件有：input、select、button和textarea)中不可顯示。
ng-model是雙向繫結，$scope<--->view層。
{{}}用於顯示資料。
完整程式碼
<!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>我的筆記</h2> <p> <textarea ng-model="message" rows="10" cols="20" maxlength="100"> </textarea> </p> <p> <button ng-click="save()">儲存</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>