Yes and no.<p>Homerolled solutions such as this are free of another developers assumptions, but tend to scale poorly. Generally they need to be modified as new requirements are created, or unforeseen circumstances arise.<p>Over time you end up putting together more and more logic in and the illogical conclusion is that you end up  building your own heavily bespoke version of React&#x2F;Angular&#x2F;jQuery&#x2F;whatever, before realising you actually need to go back and start again.<p>There is absolutely nothing wrong with writing your own libs (it&#x27;s educational and character building!) but to chuck json through a constructor is trivial. Sure - this code renders views in a simple and relatively inefficient way, but drawing boxes is only part of what React is doing.