Modern Full-Stack Development

 The Beginning of the State Object
Now, it’s finally time to start building the state object itself. This begins very much like 
the state object in MailBag did, with a function:
export function createState(
  inParentComponent: React.Component
) {
  return {
Chapter 11   time for fun: BattleJong, the Client

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We’re returning an object literal, and I usually like to put all my object fields (or 
properties) first, and that is indeed what we find first:
layout : [ ]
The server, you’ll recall, sends the layout of the board to each client when the game 
begins. This is where that layout gets stored. But something new is presenting itself here, 
and as a result, I think it’s time for…