How to handle user authentication in Vue.js?

You can use Vuex for state management and store user authentication information:

// Vuex store
state: {
  isAuthenticated: false,
  user: null
},
mutations: {
  login(state, user) {
    state.isAuthenticated = true;
    state.user = user;
  },
  logout(state) {
    state.isAuthenticated = false;
    state.user = null;
  }
}