Adding the locale to route prefixes in vue.js by utilizing vue-i18n

Question

Adding the locale to route prefixes in vue.js by utilizing vue-i18n

One of my files, named locale.js, is responsible for determining the user's locale. Below is the code snippet:

import store from '@/vuex/index'

let locale

const defaultLocale = 'en_US'

if (store.getters['auth/authenticated']) {
  locale = store.getters['auth/currentUser'].locale || defaultLocale
} else {
  if (localStorage.getItem('locale')) {
    locale = localStorage.getItem('locale')
  } else {
    locale = defaultLocale
  }
}

export default locale

Additionally, there is another file named i18n.js that creates the i18n instance used during app initialization.

import Vue from 'vue'
import VueI18n from 'vue-i18n'
import locale from '@/services/locale'

Vue.use(VueI18n)

const fallbackLocale = 'en_US'

let i18n = new VueI18n({
  locale,
  fallbackLocale,
})

i18n.setLocaleMessage('ru_RU', require('@/lang/ru_RU.json'))
i18n.setLocaleMessage('en_US', require('@/lang/en_US.json'))

export { i18n }

I am considering adding locale prefixes to URLs, such as /en/profile or /ru/profile, for easier sharing. However, I am unsure of the best approach to implement this change. Simply making all routes children and adding /:locale? is not ideal due to initialization constraints (I pass i18n and router instances simultaneously during app root initialization).

What would be the most effective method to achieve this?

javascript vue.js internationalization vue-i18n

Answer 1

Answer №1

If you want to create a dynamic router in your Vue.js application, you can follow the example below:

routes: [{
    path: '/:lang',
    children: [
      {
        path: 'home',
        component: Home
      },
      {
        path: 'about',
        component: About
      },
      {
        path: 'contactus',
        component: ContactUs
      }
    ]
  }]

In order to set the locale for your application, you can add the following logic to the beforeEach hook:

// Use the beforeEach route guard to set the language
router.beforeEach((to, from, next) => {

  // Retrieve the language from the routing param or use the default language
  let language = to.params.lang;
  if (!language) {
    language = 'en';
  }

  // Set the current language for vuex-i18n. Please ensure that the translation data
  // for the language is loaded before this step
  Vue.i18n.set(language);
  next();

});

Answer 2

If you want to create a dynamic router in your Vue.js application, you can follow the example below:

routes: [{
    path: '/:lang',
    children: [
      {
        path: 'home',
        component: Home
      },
      {
        path: 'about',
        component: About
      },
      {
        path: 'contactus',
        component: ContactUs
      }
    ]
  }]

In order to set the locale for your application, you can add the following logic to the beforeEach hook:

// Use the beforeEach route guard to set the language
router.beforeEach((to, from, next) => {

  // Retrieve the language from the routing param or use the default language
  let language = to.params.lang;
  if (!language) {
    language = 'en';
  }

  // Set the current language for vuex-i18n. Please ensure that the translation data
  // for the language is loaded before this step
  Vue.i18n.set(language);
  next();

});

Answer 3

Answer №2

When all your routes are nested under a single /:locale?, there are a couple of potential problems to consider.

Issues may arise with ambiguous route definitions. For example, if you have routes like /:locale?/foo/bar and /:locale?/bar, which route will
```
<RouterLink to="/foo/bar" />
```
match? This can lead to invalid locale selections unless you constrain the :locale parameter using a regex pattern. You can define the supported locales statically or dynamically to avoid this ambiguity.

If the translations and list of supported locales are fetched dynamically, you'll need a regex specific to your locale tag format, such as BCP-47 guidelines. Correctly defining regex and handling unsupported locales is crucial for proper routing.
Accidentally defining routes with absolute paths rather than relative paths can cause issues in nested routes. Vue-router allows overriding parent route paths with absolute paths, but this may lead to unmatched routes if not used appropriately. This mistake can be easily overlooked during development, especially when prototyping in English.

In a large application with multiple route definition files and developers, catching such errors can be challenging. Clear documentation and team communication are essential to avoid these pitfalls.
Ensuring the correct locale parameter is injected into every <RouterLink> and navigation call is essential when using nested routes. Failure to do so might not result in immediate errors, making it hard to detect. Implementing custom components or mixins to automate this process can help prevent accidental omissions.

Addressing these challenges by reconsidering how the locale is handled in your routes, such as matching it before initializing the router, can offer alternative solutions. However, these approaches may have drawbacks in terms of user experience and page loading times.

Answer 4

When all your routes are nested under a single /:locale?, there are a couple of potential problems to consider.

Issues may arise with ambiguous route definitions. For example, if you have routes like /:locale?/foo/bar and /:locale?/bar, which route will
```
<RouterLink to="/foo/bar" />
```
match? This can lead to invalid locale selections unless you constrain the :locale parameter using a regex pattern. You can define the supported locales statically or dynamically to avoid this ambiguity.

If the translations and list of supported locales are fetched dynamically, you'll need a regex specific to your locale tag format, such as BCP-47 guidelines. Correctly defining regex and handling unsupported locales is crucial for proper routing.
Accidentally defining routes with absolute paths rather than relative paths can cause issues in nested routes. Vue-router allows overriding parent route paths with absolute paths, but this may lead to unmatched routes if not used appropriately. This mistake can be easily overlooked during development, especially when prototyping in English.

In a large application with multiple route definition files and developers, catching such errors can be challenging. Clear documentation and team communication are essential to avoid these pitfalls.
Ensuring the correct locale parameter is injected into every <RouterLink> and navigation call is essential when using nested routes. Failure to do so might not result in immediate errors, making it hard to detect. Implementing custom components or mixins to automate this process can help prevent accidental omissions.

Addressing these challenges by reconsidering how the locale is handled in your routes, such as matching it before initializing the router, can offer alternative solutions. However, these approaches may have drawbacks in terms of user experience and page loading times.

Adding the locale to route prefixes in vue.js by utilizing vue-i18n

Answer №1

Answer №2

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