I'm just learning about indexedDB, and this is my understanding of setting up a database. You call `.open(dbName)` to get a DB instance. If no database of this name exists on the user's computer (for instance if this is their first visit to the site) then this triggers an onUpdateNeeded event, which is therefore where you should do initialization stuff like creating the ObjectStores.

Now, you can also pass in a version - `.open(dbName, version)` - and if the database exists but uses a lower version, this forces an onUpdateNeeded event regardless. Now, I can see the utility of this... but why have an integer argument? If the point of the "version" argument is to force updates, why not just have a `forceUpdate` flag? Why have an integer version argument which you therefore need to increment ever higher as you debug your code, presumably reaching version 156 after many days of debugging?

Is the version used in some functionality that I'm not aware of beyond just forcing updates, and if not, what is the rationale behind it? Also, are you intended to just keep changing the version during development but keep it fixed once the app is released, or is the idea that you should keep changing it throughout the lifecycle of your app?