How can I implement persisted state in Vue 3?

How can I implement persisted state in Vue 3?

You can use libraries like Vuex with plugins or localStorage to persist state in Vue 3. Would you like a code example?

Yes, please provide a code example using localStorage.

Sure! You can create a Vue 3 app and use the mounted lifecycle hook to load data from localStorage. Here's a simple example:

export default {
  data() {
    return {
      myData: ''
    };
  },
  mounted() {
    this.myData = localStorage.getItem('myData') || '';
  },
  methods: {
    saveData() {
      localStorage.setItem('myData', this.myData);
    }
  }
};

This will load the data when the component mounts and save it when you call saveData.

What if I want to use Vuex instead?

If you want to use Vuex, you can create a plugin to sync your Vuex state with localStorage. Here's a basic example:

const createPersistedState = (key) => {
  return (store) => {
    const savedState = localStorage.getItem(key);
    if (savedState) {
      store.replaceState(Object.assign({}, store.state, JSON.parse(savedState)));
    }
    store.subscribe((mutation, state) => {
      localStorage.setItem(key, JSON.stringify(state));
    });
  };
};

const store = new Vuex.Store({
  state: {},
  mutations: {},
  plugins: [createPersistedState('myVuexState')]
});

This will keep your Vuex state in sync with localStorage.