jquery,js简单实现类似Angular.js双向绑定

<div ng-app="myApp" ng-controller="myCtrl">  名字: <input ng-model="name"> <h1>你输入了: {{name}}</h1></div>

<div class="wrap">    <textarea></textarea>    <div class="miss"></div> </div>

 $('textarea').on('input propertychange', function() {   $('.miss').html($(this).val().length + "~"+$(this).val()); });

var txt = document.querySelector("textarea"),    msg = document.querySelector(".miss");  //不兼容IE8 以下  txt.addEventListener("input",function () {    msg.innerHTML = this.value + "~"+this.value.length;  },false)