Simple Mobx 6 cache example

mobx-6-cache.js

class UsersStore {
  isLoaded = false;
  users = [];

  constructor() {
    makeAutoObservable(this)
  }
  
  loadUsers() {
    if (this.isLoaded) {
      return;
    }
    
    this.isLoading = true;
    this.apiClient.usersFetch()
      .then(action((users) => {
        this.users = users;
        this.isLoaded = true;
      }))
      .finally(action(() => this.isLoading = false))
  }
}