text: //prefixes of implementation that we want to test
     window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
  
     //prefixes of window.IDB objects
     window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
     window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange
  
     if (!window.indexedDB) {
        window.alert("Your browser doesn't support a stable version of IndexedDB.")
     }
  
     const employeeData = [
        { id: "00-01", name: "gopal", age: 35, email: "gopal@tutorialspoint.com" },
        { id: "00-02", name: "prasad", age: 32, email: "prasad@tutorialspoint.com" }
     ];
     var db;
     var request = window.indexedDB.open("newDatabase", 1);
  
     request.onerror = function(event) {
        console.log("error: ");
     };
  
     request.onsuccess = function(event) {
        db = request.result;
        console.log("success: "+ db);
     };
  
     request.onupgradeneeded = function(event) {
        var db = event.target.result;
        var objectStore = db.createObjectStore("employee", {keyPath: "id"});
  
        for (var i in employeeData) {
           objectStore.add(employeeData[i]);
        }
     }
  
     function read() {
        var transaction = db.transaction(["employee"]);
        var objectStore = transaction.objectStore("employee");
        var request = objectStore.get("00-03");
  
        request.onerror = function(event) {
           alert("Unable to retrieve daa from database!");
        };
  
        request.onsuccess = function(event) {
           // Do something with the request.result!
           if(request.result) {
              alert("Name: " + request.result.name + ", Age: " + request.result.age + ", Email: " + request.result.email);
           }
  
           else {
              alert("Kenny couldn't be found in your database!");
           }
        };
     }
  
     function readAll() {
        var objectStore = db.transaction("employee").objectStore("employee");
  
        objectStore.openCursor().onsuccess = function(event) {
           var cursor = event.target.result;
  
           if (cursor) {
              alert("Name for id " + cursor.key + " is " + cursor.value.name + ", Age: " + cursor.value.age + ", Email: " + cursor.value.email);
              cursor.continue();
           }
  
           else {
              alert("No more entries!");
           }
        };
     }
  
     function add() {
        var request = db.transaction(["employee"], "readwrite")
        .objectStore("employee")
        .add({ id: "00-03", name: "Kenny", age: 19, email: "kenny@planet.org" });
  
        request.onsuccess = function(event) {
           alert("Kenny has been added to your database.");
        };
  
        request.onerror = function(event) {
           alert("Unable to add data\r\nKenny is aready exist in your database! ");
        }
     }
  
     function remove() {
        var request = db.transaction(["employee"], "readwrite")
        .objectStore("employee")
        .delete("00-03");
  
        request.onsuccess = function(event) {
           alert("Kenny's entry has been removed from your database.");
        };
     }
  