Vuex Tutorial

Vuex is a state management pattern + library for Vue.js applications. It serves as a centralized store for all the components in an application, with rules ensuring that the state can only be mutated in a predictable way.

Getting Started

Before diving into Vuex, make sure you have Vue.js set up in your project. You can follow the Vue.js installation guide to get started.

Key Concepts

State: The central part of Vuex is the state, which is a plain JavaScript object.
Getters: Getters are functions that return state values.
Mutations: Mutations are functions that directly mutate the state.
Actions: Actions are similar to mutations, but instead of mutating the state, actions commit mutations.

Example

Here's a simple example to demonstrate how Vuex works:

// store.js
import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    count: 0
  },
  mutations: {
    increment(state) {
      state.count++;
    }
  },
  actions: {
    increment(context) {
      context.commit('increment');
    }
  },
  getters: {
    doubleCount(state) {
      return state.count * 2;
    }
  }
});

// main.js
import Vue from 'vue';
import App from './App.vue';
import store from './store';

new Vue({
  store,
  render: h => h(App)
}).$mount('#app');

<!-- App.vue -->
<template>
  <div>
    <h1>Count: {{ count }}</h1>
    <button @click="increment">Increment</button>
  </div>
</template>

<script>
export default {
  computed: {
    count() {
      return this.$store.state.count;
    }
  },
  methods: {
    increment() {
      this.$store.dispatch('increment');
    }
  }
}
</script>

Vuex vs. Local Storage

Vuex is often compared to local storage. While both can be used to store data, Vuex is a more robust solution for complex applications. It provides a centralized state management system, making it easier to maintain and debug your application.

Conclusion