Discovering the Vue instance within Vuex

Question

Discovering the Vue instance within Vuex

In the Vue.js project's main.js file, I have defined a global variable.

Vue.prototype.$API = "myapihere"

I am able to access this variable from anywhere in my project using this.$API.

However, when trying to access it in Vuex, it is returning as undefined.

console.log(this.$API);

The value of this.$API is not defined in Vuex.

How can I properly use my $API variable in Vuex?

javascript vue.js vuex vue-storefront

Answer 1

Answer №1

Insight into Vue 2 and Vuex 3

To access the Vue instance within the store, simply refer to this._vm

const store = new Vuex.Store({
  mutations: {
    test(state) {
      console.log(this._vm);
    }
  }
});

Answer 2

Insight into Vue 2 and Vuex 3

To access the Vue instance within the store, simply refer to this._vm

const store = new Vuex.Store({
  mutations: {
    test(state) {
      console.log(this._vm);
    }
  }
});

Answer 3

Answer №2

After upgrading to Vue 3, I noticed that Vue.prototype.$foo was no longer available. Additionally, I discovered that this._vm was missing in my version of Vuex.

Following the recommendation from the Vue 3 documentation, I delved into the Provide / Inject method which allowed me to access globals within components but not within the store.

To solve this issue, I opted to utilize globalProperties on the Vue object and standard properties on store, setting them before mounting the app.

main.js:

import store from './store/index';
import App from './App.vue';

// Load custom globals
import conf from '@/inc/myapp.config';

const app = createApp(App)
  .use(store);

// Register globals in app and store
app.config.globalProperties.$conf = conf;
store.$conf = conf;

app.mount('#app');

What I find advantageous about this approach is the consistent way I can access globals in both store and components.

In a component:

export default {
  data() {
    return {
    };
  },
  created() {
    console.log( this.$conf.API_URL );
  },
}

...and you can access this.$conf.API_URL in actions, mutations, and getters as well.

Once I implemented this solution, I no longer needed to access the entire Vue instance within the store. However, if necessary, you can assign store.$app = app; in the same location in main.js.

Answer 4

After upgrading to Vue 3, I noticed that Vue.prototype.$foo was no longer available. Additionally, I discovered that this._vm was missing in my version of Vuex.

Following the recommendation from the Vue 3 documentation, I delved into the Provide / Inject method which allowed me to access globals within components but not within the store.

To solve this issue, I opted to utilize globalProperties on the Vue object and standard properties on store, setting them before mounting the app.

main.js:

import store from './store/index';
import App from './App.vue';

// Load custom globals
import conf from '@/inc/myapp.config';

const app = createApp(App)
  .use(store);

// Register globals in app and store
app.config.globalProperties.$conf = conf;
store.$conf = conf;

app.mount('#app');

What I find advantageous about this approach is the consistent way I can access globals in both store and components.

In a component:

export default {
  data() {
    return {
    };
  },
  created() {
    console.log( this.$conf.API_URL );
  },
}

...and you can access this.$conf.API_URL in actions, mutations, and getters as well.

Once I implemented this solution, I no longer needed to access the entire Vue instance within the store. However, if necessary, you can assign store.$app = app; in the same location in main.js.

Answer 5

Answer №3

You can choose from 2 different approaches:

One option is to pass down the property (or access the _vm property from within Vuex) as an argument from a component
```
methods: {
  this.$store.dispatch('someAction', this.$API)
}
```

Alternatively, you can declare and export the same variable from another file and use it in your main.js AND Vuex file:

// api.js
export const API = "http://localhost:5000/api"

// main.js
import { API } from './api.js
...
Vue.prototype.$API = API

// store.js
import { API } from './api.js

// API can now be utilized!

While personally leaning towards the second approach, I would not recommend storing the API path in Vue at all. It's preferable to have the api.js file act as a service for handling ajax calls, which can then be consumed wherever needed.

Answer 6

You can choose from 2 different approaches:

One option is to pass down the property (or access the _vm property from within Vuex) as an argument from a component
```
methods: {
  this.$store.dispatch('someAction', this.$API)
}
```

Alternatively, you can declare and export the same variable from another file and use it in your main.js AND Vuex file:

// api.js
export const API = "http://localhost:5000/api"

// main.js
import { API } from './api.js
...
Vue.prototype.$API = API

// store.js
import { API } from './api.js

// API can now be utilized!

While personally leaning towards the second approach, I would not recommend storing the API path in Vue at all. It's preferable to have the api.js file act as a service for handling ajax calls, which can then be consumed wherever needed.

Answer 7

Answer №4

utilize this._vm

here is the rationale

by default, when you reference this in a Vuex store, it will refer to the store so the output will look like this

https://i.sstatic.net/n5qnx.png

subsequently, you can observe that there is a property called _vm in the store as shown here https://i.sstatic.net/w1pVF.png

the _vm property points to the Vue component, therefore to access it, you must utilize this._vue

it's recommended to create a getter for the Vue instance like so

const store = new Vuex.Store({
  getters: {
    vue(state) {
      return this._vm
    }
  }
});

//now you can access it throughout your store
store.getters.vue

//Note
//this method of accessing the getter only works on non `namespaced` stores

Answer 8

utilize this._vm

here is the rationale

by default, when you reference this in a Vuex store, it will refer to the store so the output will look like this

https://i.sstatic.net/n5qnx.png

subsequently, you can observe that there is a property called _vm in the store as shown here https://i.sstatic.net/w1pVF.png

the _vm property points to the Vue component, therefore to access it, you must utilize this._vue

it's recommended to create a getter for the Vue instance like so

const store = new Vuex.Store({
  getters: {
    vue(state) {
      return this._vm
    }
  }
});

//now you can access it throughout your store
store.getters.vue

//Note
//this method of accessing the getter only works on non `namespaced` stores

Answer 9

Answer №5

Recently, with the latest versions of Vuex 4.* and Vue 3.*, it has been observed that the property this.$app is no longer defined for the store object. Instead, this.$router represents Vue Router.

To access the app in the store using JavaScript, you can do the following:

The updated code would look like: router.app = app; and within an action, you can retrieve the app as follows: let app = this.$router.app;

Answer 10

Recently, with the latest versions of Vuex 4.* and Vue 3.*, it has been observed that the property this.$app is no longer defined for the store object. Instead, this.$router represents Vue Router.

To access the app in the store using JavaScript, you can do the following:

The updated code would look like: router.app = app; and within an action, you can retrieve the app as follows: let app = this.$router.app;

Discovering the Vue instance within Vuex

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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