Vuex Getters

Vuex Getters

Vuex getters behave a lot like Mongoose getters. Getters are how you bind store data to local data in your Vue components. Here's what you need to know.

Vuex getters behave a lot like Mongoose getters: they're special properties that are computed from other properties when you access them.

For example, suppose your store contains a user's firstName and lastName. You can write a getter that returns the user's fullName.

const Vuex = require('vuex');

const store = new Vuex.Store({
  state: {
    firstName: 'Bill',
    lastName: 'Gates'
  },
  getters: {
    fullName: state => `${state.firstName} ${state.lastName}`
  }
});

store.getters.fullName; // 'Bill Gates'

Change Tracking

Vuex getters react to changes in the store's state just like computed properties. So if you update one of the state properties the getter relies on, the getter value updates too:

const store = new Vuex.Store({
  state: {
    firstName: 'Bill',
    lastName: 'Gates'
  },
  getters: {
    fullName: state => `${state.firstName} ${state.lastName}`
  },
  mutations: {
    changeFirstName(state, val) {
      state.firstName = val;
    }
  }
});

// When you commit a change, the next time you access the getter you get
// an updated value!
store.commit('changeFirstName', 'William');
store.getters.fullName; // 'William Gates'

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