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Editorial Team
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Asked: 2026-05-29T08:04:46+00:00

I’m trying to get some data stored locally using IndexedDB. Below I’m I have

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I’m trying to get some data stored locally using IndexedDB. Below I’m I have a simple example with which I’m trying to get the onupgradeneeded event to fire

<html>
  <head>
    <script>

      var indexedDB = window.indexedDB || window.webkitIndexedDB 
                    ||window.mozIndexedDB||window.msIndexedDB;

      var request = indexedDB.open("mydb",2),    

      customerData=[
        {ssn:"444-44-4444",name:"Bill",age:35,email:"bill@company.com"},      
        {ssn:"555-55-5555",name:"Donna",age:32,email:"donna@home.org"}
      ];

      request.onerror = function(event){
         alert("ERROR") ;
      };
      request.onupgradeneeded = function(event) {
         alert("UPGRADE NEEDED") ;
         var objectStore = db.createObjectStore("customers",{keyPath:"ssn"});
         objectStore.createIndex("name","name",{unique:false});
         objectStore.createIndex("email","email",{unique:true});

         for(var i in customerData){
            objectStore.add(customerData[i]);
         }
      } ;
      request.onsuccess = function(e) {
         alert("SUCCESS") ;
      } ;
    </script>
  </head>
</html>

I tried to change the version number but whatever I try onupgradeneeded is never called/fired. Any suggestions why ?

cheers
Luca

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1 Answer

  1. Editorial Team

    I tested this in FF 10 and it worked for me. (Until the code tried to use the undefined “db” variable”.)

    What browser are you using? The upgradeneeded event is only raised in FF 10. Chrome 16 still uses the old draft where you have to check the db.version property and call db.setVersion if it’s not what you want.

    If you are using FF10, are you sure that “mydb” isn’t already created?

    Also, be sure that you’re testing this through a real web server. FF won’t let you use indexedDB with local HTML files. If that’s happening, you should see an error like “The operation failed for reasons unrelated to the database itself and not covered by any other error code” in your console.

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