class-is-king.ts

import { immerable, produce } from 'immer'

type POJO<T> = {
  [K in keyof T]: T[K]
}

class Car {
  [immerable] = true

  velocity = 0

  static fromJSON(data: POJO<Car>) {
    return Object.assign(new Car, data)
  }

  accelerate() {
    this.velocity = 50
  }
  
  toJSON(): POJO<Car> {
    return this // copy to pojo if you need
  }
}

const prevState = new Car; 
const newState = produce(prevState , c => c.accelerate())

const cars = await api.cars.list().then(cars => cars.map(Car.fromJSON))