Populate tables first time the db is created?

[Toshinaki]

I'm working on a React app.
I'd like to fill tables with fake data the first time I start the app and open in browser.

I tried to do it with on('ready'), but every time I refresh the page, the ready is triggered and the tables are filled again.
Is there any way to detect if no table exist before, and if it's the first time the db is created, then populate it?