test this point

index.js

@@ -90,7 +90,7 @@ const app=createApp({
       const books=this.books;
       // console.log("------this : "+this);
       const request = new XMLHttpRequest();
-      request.onload=function(books){
+      request.onload=function(this){
         console.log("--------parse tomcat server string--------");
         const res=JSON.parse(request.responseText);
 
@@ -102,12 +102,16 @@ const app=createApp({
         console.log("res[0].pages :"+res[0].pages);
         console.log("res[1][\"title\"] :"+res[1]["title"]);
         console.log("res[1][\"author\"] :"+res[1]["author"]);
+        console.log("res[1].publisher :"+res[1].publisher);
+        console.log("res[1].pages :"+res[1].pages);
         console.log("this.tomcat_res : "+this.tomcat_res);
         alert("this.tomcat_res : "+this.tomcat_res);
         
-        console.log("------books : "+books);
-        books.add(res[0]);
-        console.log("------books : "+books);
+        // console.log("------books : "+books);
+        console.log("------this.books : "+this.books);
+        // books.add(res[0]);
+      
+        // console.log("------books : "+books);
         // console.log("------this : "+this);
         console.log("this.tomcat_res : "+this.tomcat_res);
       };