Looking to retrieve a cookie within Vue Router in Vue 3? Utilize the following approach within your router's `index.js

Question

Looking to retrieve a cookie within Vue Router in Vue 3? Utilize the following approach within your router's `index.js

Scenario: Developing a Vue3 app with express as the API backend. Express utilizes express-sessions to create a server-side session that is transmitted to the browser and received in subsequent requests.

I am in the process of implementing a route guard to restrict access to specific routes if the session cookie is not present.

"vue": "^3.0.11",
"vue3-cookies": "1.0.1",

The NPM package that has been installed is:

https://www.npmjs.com/package/vue3-cookies

Following this, in main.js

import VueCookies from 'vue3-cookies'
app.use(VueCookies);

And then in router/index.js

function requireAuth(to,from,next){
  console.log(this);
  console.log(this.$cookies.get('_ga'))
  next();
}

const routes = [
  {
    path: '/',
    name: 'ProtectedRoute',
    component: ProtectedRoute,
    beforeEnter:requireAuth
  }

const router = createRouter({
  history: createWebHistory(process.env.BASE_URL),
  routes
})

Error: [Vue Router warn]: Unexpected error when starting the router: TypeError: Cannot read property '$cookies' of undefined

Attempts have been made with:

this.$cookies.get('_ga')
Vue.$cookies.get('_ga')
window.$cookies.get('_ga')

However, none of them have been successful.

An attempt was also made to import Vue into the index.js file, but it failed due to the inability to import Vue into a component in Vue3 as explained in Vue.js 3: Cannot import Vue global object

The issue appears to be that this, Vue, and window are all undefined. A solution was attempted based on the suggestions here `this` undefined in vue-router beforeEach

router.beforeEach((to,from,next) => {
  console.log(router.app); //still undefined!
});

In need of assistance!

javascript vue.js session-cookies vuejs3

Answer 1

Answer №1

I found a solution that worked for me:

//router.js
import { useCookies } from "vue3-cookies";
const { cookies } = useCookies();

console.log(cookies.get('...'));

Answer 2

I found a solution that worked for me:

//router.js
import { useCookies } from "vue3-cookies";
const { cookies } = useCookies();

console.log(cookies.get('...'));

Answer 3

Answer №2

In Vue Router 4, the router.app property has been removed. However, you can manually add it during router setup:

// main.js
import router from './router'

const app = createApp(App)

app.use(router)
router.app = app

app.mount('#app')

You can then use this reference in the router configuration script to access

app.config.globalProperties.$cookies

(the globally added property by vue3-cookies):

// router.js
const router = createRouter({
  history: createWebHistory(),
  routes
})

function requireAuth(to, from, next) {
  const { $cookies } = router.app.config.globalProperties
  console.log('_ga', $cookies.get('_ga'))
  next()
}

export default router

Check out the demo here

Answer 4

In Vue Router 4, the router.app property has been removed. However, you can manually add it during router setup:

// main.js
import router from './router'

const app = createApp(App)

app.use(router)
router.app = app

app.mount('#app')

You can then use this reference in the router configuration script to access

app.config.globalProperties.$cookies

(the globally added property by vue3-cookies):

// router.js
const router = createRouter({
  history: createWebHistory(),
  routes
})

function requireAuth(to, from, next) {
  const { $cookies } = router.app.config.globalProperties
  console.log('_ga', $cookies.get('_ga'))
  next()
}

export default router

Check out the demo here

Answer 5

Answer №3

After researching further based on tony19's suggestion, I discovered a different approach that solved my issue. I noticed that router.app was removed and my attempts to add it back manually were unsuccessful. Instead, I decided to export the app instance from my main.js file:

// main.js
export { app };

Then I imported it into the router file:

// router.js
import { app } from '...'

By doing this, I was able to access the app instance's configuration, which included the $cookies.get method:

console.log(app.$cookies.get('...'))

Answer 6

After researching further based on tony19's suggestion, I discovered a different approach that solved my issue. I noticed that router.app was removed and my attempts to add it back manually were unsuccessful. Instead, I decided to export the app instance from my main.js file:

// main.js
export { app };

Then I imported it into the router file:

// router.js
import { app } from '...'

By doing this, I was able to access the app instance's configuration, which included the $cookies.get method:

console.log(app.$cookies.get('...'))

Answer 7

Answer №4

After reading Syll's answer, I realized a mistake in my code that was causing issues. Instead of using {} when setting the const, I needed to call .cookies() method on the object returned by useCookies() from the vue3-cookies library. Here is the corrected approach:

import { useCookies } from "vue3-cookies";
const cookies_manager = useCookies();

console.log(cookies_manager.cookies.get('myCookieName'));

To avoid this issue, you can simply use

const { cookies } = useCookies();

(with curly braces) instead.

Answer 8

After reading Syll's answer, I realized a mistake in my code that was causing issues. Instead of using {} when setting the const, I needed to call .cookies() method on the object returned by useCookies() from the vue3-cookies library. Here is the corrected approach:

import { useCookies } from "vue3-cookies";
const cookies_manager = useCookies();

console.log(cookies_manager.cookies.get('myCookieName'));

To avoid this issue, you can simply use

const { cookies } = useCookies();

(with curly braces) instead.

Looking to retrieve a cookie within Vue Router in Vue 3? Utilize the following approach within your router's `index.js

Answer №1

Answer №2

Answer №3

Answer №4

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