Using lowdb with TypeScript; instantly instantiates a typed db with defaults and compile-time-checked queries

index.ts

import low from 'lowdb'
import FileSync from 'lowdb/adapters/FileSync'

export const database = <T> (defaults: T) => {
  const adapter = new FileSync<T>('db.json')
  const db = low(adapter)
  db.defaults(defaults).write()
  return db
}