Tiny typed store in TypeScript

A tiny observable store, typed on its state shape.

type Subscriber<T> = (state: T) => void;

class Store<T> {
  private subscribers: Subscriber<T>[] = [];

  constructor(private state: T) {}

  set(state: T): void {
    this.state = state;
    for (const fn of this.subscribers) fn(state);
  }

  subscribe(fn: Subscriber<T>): void {
    this.subscribers.push(fn);
  }
}

Keywords and builtins used here

• Subscriber
• T
• class
• const
• constructor
• for
• of
• private
• this
• type

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Step 3 of 5 in Building & injecting, step 11 of 19 in Classes & patterns.

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