Version

An instance of a Version class can only be returned from the Dexie.version() method. Use it to define the schema and any upgrader function for that specific version.

Sample

var db = new Dexie("FriendsAndPetsDatabase");
db.version(2).stores({
    friends: "++id,name,birthdate,sex",
    pets: "++id,name,kind"
}).upgrade (function (trans) {
    var YEAR = 365 * 24 * 60 * 60 * 1000;
    trans.friends.each (function (friend, cursor) {
        friend.birthdate = new Date(Date.now() - (friend.age * YEAR));
        delete friend.age;
        cursor.update (friend);
    });
});
// Always keep the declarations previous versions as long as there might be users having them running.
db.version(1).stores({
    friends: "++id,name,age,sex",
    pets: "++id,name,kind"
});
db.open(); 

Methods

stores()

Specify the database schema (object stores and indexes) for a certain version.

upgrade()

Specify an upgrade function for upgrading between previous version to this one.