Small Program Instant Chat (page only function, WebSocket not received)

We all know that small programs can not directly manipulate the DOM, so do instant messaging chat function can not be as before: Click Send, splicing a node to the page. Not much to say, the following are the effects and code:

-----------------------Chat.js------------------------------

Pages/chat/chat.jspage (initial data for {/** * page */data: {lists: [], scrolltop:100,//set scroll bar to top distance C    Entence: ', length:0,},//Click Send event handler function additemfn:function () {var {lists} = This.data;    var NewData = {Value:this.data.centence};    Lists.push (NewData); This.setdata ({lists:lists, centence: '}) Console.log (lists)}, Inputfunc:function (e) {This.setdata ({centence:e.detail.value})//Console.log (This.data.centence)},/** * life cycle Function--listening page loading */Onload:fun Ction (Options) {},/** * life cycle Function--listener page First render complete */Onready:function () {},/** * life cycle Function--monitor page display */On Show:function () {},/** * life cycle Function--listener page Hidden */Onhide:function () {},/** * life cycle Function--monitor page unload */onUnload   : function () {},/** * page-related event handler--Listener user drop-down action */Onpulldownrefresh:function () {},/** * processing function for pull-bottom event on page */Onreachbottom:function () {},/** * Users click on the upper right corner to share */onshareappmessage:function () {    }}) 

------------------------Chat.wxml-------------------------------

<view class= "Container" >  <!--<button type= "PRIMARY" > Add </button>--  < Scroll-view class= "Scroll" scroll-y= "true" scroll-top= "{{scrolltop}}" >    <block wx:for= "{{lists}}" wx:key= " *this ">      <view class=" item "data-index=" {{index}} "Id=" Item{{index}} "class=" Mymsg FlexBox ">        < View class= "MSG" ><view class= "eachmsg" >{{item.value}}</view><text class= "Iconfont Icon-triangle-right "></text></view>        <image src= '/assets/images/chatdoc.png ' ></image >      </view>    </block>  </scroll-view>  <view class= "Bottom" >    < Input placeholder= "" Auto-focus name= "centences" bindinput= ' Inputfunc ' value= "{{centence}}" Auto-focus/>    <view class= ' icon ' bindtap= ' ADDITEMFN ' >      <text> send </text>    </view>  </view ></view>

　　

Hope to teach each other ....

Applet Instant Chat (page function only, WebSocket not received)