combining-the-command-pattern-with-state-pattern-in-java-script_2.js

function notifySubscribers(...args) {
  subscribers.forEach((fn) => fn(...args))
}

function setBackgroundColor(color) {
  setState((prevState) => ({
    ...prevState,
    backgroundColor: color,
  }))
}

function addProfile(profile) {
  setState((prevState) => ({
    ...prevState,
    profiles: prevState.profiles.concat(profile),
  }))
}