How can we wrap the Vuex store within a Vue plugin's install function?

  • I developed a plugin that utilizes Vuex for state management.
// plugin.js
import Vuex from "vuex";
import store from "./store.js";

export default {
  install(Vue, options) {
    const storeInstance = new Vuex.Store(store);
    Vue.prototype.$store = storeInstance;
  }
};
  • Within this plugin, I import a store object.
// store.js
export default {
  actions: {
    SOME_RANDOM_ACTION({ state, commit }) {
      console.log("some random action");
    }
  }
};

Dispatching actions and accessing state are functioning correctly.

However, when integrating this plugin into another Vue instance with Vuex, the store object resets with a new state.

// index.js
import Vue from "vue";
import Vuex from "vuex";
import App from "./App.vue";
import plugin from "./plugin.js";

Vue.use(Vuex);
Vue.use(plugin);

new Vue({
  // WARNING: When uncommented, Vuex re-initializes with a new object
  // store: new Vuex.Store({ state: { hello: "hix" } }),
  components: {
    App
  }
}).$mount("#app");

Uncommenting the store initialization results in the plugin's defined store becoming unavailable.

Currently, I am considering the following solutions:

  1. Exporting the plugin's store object to the main app file (index.js) and using it as a module.
  2. Exploring alternative state management solutions.

Is there a way to effectively utilize Vuex within my plugin?

https://codesandbox.io/s/vibrant-sanne-67yej?file=/src/main.js:0-371

Answer №1

When developing a Vuex plugin, the store option is utilized to link the store instance with Vue.prototype.$store, mirroring what you would do in your own plugin.

To avoid conflicts when using multiple stores, it's important to name each store object differently within the plugin instead of simply using $store.

Vue.prototype.$myPluginStore = storeInstance;

However, this approach doesn't completely isolate $myPluginStore within the plugin, as it remains accessible throughout the app.

// App.vue

computed: {
    appState() {
      return this.$store.state; // Default $store
    },
    pluginState() {
      return this.$myPluginStore.state; // Accessible within the main app
    }
}

A potential solution could be to utilize a store as a module within an existing store, rather than creating a separate store. This is suitable for use within a single app, but not ideal for external plugins.

The challenge arises from the fact that the default store instance ($store) can leverage Vuex helpers like mapGetters.

Answer №2

To access the store in your components, you can utilize the install method provided by the plugin.

A convenient approach is to declare and register your store in the index.js:

import Vue from "vue";
import App from "./App.vue";
import store from "./store";
import plugin from "./plugin";

Vue.use(plugin);

new Vue({
  store,
  components: {
    App
  }
}).$mount("#app");

This allows you to utilize functions like $doStuff() and access the store via $store within the plugin.js:

export default {
  install(Vue) {
    Vue.prototype.$doStuff = function (payload) {
      this.$store.dispatch("SOME_RANDOM_ACTION", payload);
    };
  }
};

The store instance can now be accessed not only from your plugin but also from other components.

For a demonstration, check out this live example

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