Exploring the method of accessing one Vue plugin from another plugin with the use of Vue.prototype

Question

Exploring the method of accessing one Vue plugin from another plugin with the use of Vue.prototype

I'm currently working on developing a Vue plugin aimed at simplifying the management of authentication state throughout my application. This particular plugin will require interaction with other Vue plugins such as vuex, vue-router, and vue-apollo (for the time being).

I initially attempted to extend Vue.prototype, but encountered issues when trying to access the plugin's properties in the usual way - for example, using this.$apollo. This resulted in an error due to the scope of the object being incorrect, leading to an undefined response. Another approach I tried was adding vm = this and utilizing vm.$apollo, yet this only shifted the scope further out without reaching the Vue object itself, possibly because there was no instance of the Vue object available at that point.

export const VueAuth = {
  install (Vue, _opts) {
    Vue.prototype.$auth = {
      test () {
        console.log(this.$apollo)
      }
    }
  }
}

(The remaining plugins are imported and incorporated via Vue.use() within the main app.js)

An alternative approach I explored involved...

// ...
  install (Vue, { router, store, apollo })
// ...

However, being relatively new to JavaScript, I am uncertain about how this method operates regarding passing copies of objects versus mutating the originals or passing by reference. Additionally, this explicit technique may result in more overhead if the plugin needs to interact with additional plugins in the future.

Could someone offer suggestions on an efficient and organized manner to achieve this? Should I consider modifying an instance of Vue instead of the prototype?

javascript vue.js

Answer 1

Answer №1

When working within the plugin install function, it's important to note that you won't have direct access to the Vue instance (this). However, you can still utilize other plugins by accessing them via the prototype. Take a look at this example:

main.js:

Vue.use(Apollo)
Vue.use(VueAuth) // make sure this is installed after vue-apollo

plugin.js:

export const VueAuth = {
  install (Vue) {
    Vue.prototype.$auth = {
      test () {
        console.log(Vue.prototype.$apollo)
      }
    }
  }
}

Answer 2

When working within the plugin install function, it's important to note that you won't have direct access to the Vue instance (this). However, you can still utilize other plugins by accessing them via the prototype. Take a look at this example:

main.js:

Vue.use(Apollo)
Vue.use(VueAuth) // make sure this is installed after vue-apollo

plugin.js:

export const VueAuth = {
  install (Vue) {
    Vue.prototype.$auth = {
      test () {
        console.log(Vue.prototype.$apollo)
      }
    }
  }
}

Answer 3

Answer №2

After dealing with a particular issue, I stumbled upon a straightforward resolution:

To address the problem in the plugin installer, you must not only assign a value to the prototype but also to Vue itself for global usage.

Here's an example of the code:

Plugin Installer:

import apiService from "../services/ApiService";
// The service contains a 'post' method

export default {
  install(Vue) {
    Vue.prototype.$api = apiService;
    Vue.api = apiService;
  }
};

Using it in another plugin:

import Vue from "vue";

...

const response = await Vue.api.post({
  url: "/login",
  payload: { email, password }
});

Implementing it in a component:

const response = await this.$api.post({
  url: "/login",
  payload: { email, password }
});

While I cannot guarantee that this solution is ideal, it certainly resolved my specific scenario effectively.

Answer 4

After dealing with a particular issue, I stumbled upon a straightforward resolution:

To address the problem in the plugin installer, you must not only assign a value to the prototype but also to Vue itself for global usage.

Here's an example of the code:

Plugin Installer:

import apiService from "../services/ApiService";
// The service contains a 'post' method

export default {
  install(Vue) {
    Vue.prototype.$api = apiService;
    Vue.api = apiService;
  }
};

Using it in another plugin:

import Vue from "vue";

...

const response = await Vue.api.post({
  url: "/login",
  payload: { email, password }
});

Implementing it in a component:

const response = await this.$api.post({
  url: "/login",
  payload: { email, password }
});

While I cannot guarantee that this solution is ideal, it certainly resolved my specific scenario effectively.

Answer 5

Answer №3

After facing a scoping issue with this, I found a workaround by transforming my property into a closure that returns an object, effectively resolving the problem.

Delving into Vue without extensive JS knowledge, I admit that grasping the intricacies of function and scope is a daunting prospect (one that I may not be ready to tackle just yet…).

export const VueAuth = {
  install (Vue, opts) {
    Vue.prototype.$auth = function () {
      let apollo = this.$apolloProvider.defaultClient
      let router = this.$router

      return {
        logIn: function (email, password) {
          apollo.mutate({
            mutation: LOGIN_MUTATION,
            variables: {
              username: email,
              password: password,
            },
          }).then((result) => {
            // Result
            console.log(result)
            localStorage.setItem('token', result.data.login.access_token)
            router.go(router.currentRoute.path)
          }).catch((error) => {
            // Error
            console.error('Error!')
            console.error(error)
          })
        },

        logOut: function () {
          localStorage.removeItem('token')
          localStorage.removeItem('refresh-token')
          router.go()
          console.log('Logged out')
        },
      }
    }

While it's currently a basic setup, it serves its purpose for testing purposes.

Answer 6

After facing a scoping issue with this, I found a workaround by transforming my property into a closure that returns an object, effectively resolving the problem.

Delving into Vue without extensive JS knowledge, I admit that grasping the intricacies of function and scope is a daunting prospect (one that I may not be ready to tackle just yet…).

export const VueAuth = {
  install (Vue, opts) {
    Vue.prototype.$auth = function () {
      let apollo = this.$apolloProvider.defaultClient
      let router = this.$router

      return {
        logIn: function (email, password) {
          apollo.mutate({
            mutation: LOGIN_MUTATION,
            variables: {
              username: email,
              password: password,
            },
          }).then((result) => {
            // Result
            console.log(result)
            localStorage.setItem('token', result.data.login.access_token)
            router.go(router.currentRoute.path)
          }).catch((error) => {
            // Error
            console.error('Error!')
            console.error(error)
          })
        },

        logOut: function () {
          localStorage.removeItem('token')
          localStorage.removeItem('refresh-token')
          router.go()
          console.log('Logged out')
        },
      }
    }

While it's currently a basic setup, it serves its purpose for testing purposes.

Exploring the method of accessing one Vue plugin from another plugin with the use of Vue.prototype

Answer №1

Answer №2

Answer №3

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