How to Read IndexedDB data with order?

var version = 1; // Access IndexedDB object everytime function open_idb(obj,callback){ var flag = 0; try { if (DBOpenRequest) { flag = 1; } else { flag = 0; } } catch (err) { flag = 0; } if (flag == 1) { //Use older DB object var db = DBOpenRequest.result; callback(db); } else { //Create New db object DBOpenRequest = indexedDB.open("test_db", version); } DBOpenRequest.onsuccess = function(event) { try { var db = DBOpenRequest.result; callback(db); } catch (err) { callback(); } }; //Set Index DBOpenRequest.onupgradeneeded = function(event) { var db = event.target.result; //This condition will always satisfy if(event.oldVersion<1){ var object_store = db.createObjectStore('test',{keyPath: 'index'}); object_store.createIndex("index", "index",{unique:false}); object_store.createIndex("timestamp", "timestamp",{unique:false}); } db.onerror = function(event) { console.log('Error loading database.'); }; }; }; 

function push_test_data(obj,callback){ var index=obj.index; var arr=obj.arr; var len = arr.length; var db=obj.db; if(index<len){ var transaction = db.transaction(['test'], 'readwrite'); var object_store = transaction.objectStore('test'); var entry = {index:arr[index].index,timestamp:arr[index].timestamp}; var request = object_store.put(entry); request.onsuccess=function(){ index=index+1; push_test_data({index:index,arr:arr,db:db},callback); }; request.onerror=function(e){ console.log("Error "); console.log(e); }; }else{ callback(); } }; function order_by(o_){ var type=o_.type; var key=o_.key; open_idb({},function(db){ var transaction = db.transaction(['test'], 'readwrite'); var object_store = transaction.objectStore('test'); var request = object_store.index(key).openCursor(null,type); var result = []; request.onsuccess = function(event) { var cursor = event.target.result; //console.log(cursor); if(cursor){ result.push(cursor.value); cursor.continue(); }else{ console.log(":"+type+":"); console.log(result); } }; request.onerror = function(e) { console.log(e); }; }); } 

open_idb({},function(db){ var arr=[{index:1,timestamp:Date.now()+1},{index:2,timestamp:Date.now()+2}]; push_test_data({arr:arr,index:0,db:db},function(){ }); }); 

 open_idb({},function(db){ order_by({key:"timestamp",type:"next"}); // For ascending order by timestamp }); 

 open_idb({},function(db){ order_by({key:"timestamp",type:"prev"}); // For descending order by timestamp });