update index

Author: riversun

public/index.html

@@ -43,7 +43,7 @@ <h1>chatux example</h1>
 
     const opt = {
         renderMode: 'auto',//'auto' or 'pc' or 'mobile'
-        buttonOffWhenOpenFrame: false,//
+        buttonOffWhenOpenFrame: false,//only for pc mode
         bot: {
             wakeupText: null,//user input which is automatically send to server on startup
             botPhoto: null,//URL of bot photo image