in vue3 how to use i18n in router.beforeEach

[dybxin]

in vue2 i can use the following code to set document.title.

/lang/index.js

import Vue from 'vue'
import VueI18n from 'vue-i18n'
import Cookies from 'js-cookie'
import elementEnLocale from 'element-ui/lib/locale/lang/en' // element-ui lang
import elementZhLocale from 'element-ui/lib/locale/lang/zh-CN'// element-ui lang
import elementEsLocale from 'element-ui/lib/locale/lang/es'// element-ui lang
import elementJaLocale from 'element-ui/lib/locale/lang/ja'// element-ui lang
import enLocale from './en'
import zhLocale from './zh'
import esLocale from './es'
import jaLocale from './ja'

Vue.use(VueI18n)

const messages = {
  en: {
    ...enLocale,
    ...elementEnLocale
  },
  zh: {
    ...zhLocale,
    ...elementZhLocale
  },
  es: {
    ...esLocale,
    ...elementEsLocale
  },
  ja: {
    ...jaLocale,
    ...elementJaLocale
  }
}
export function getLanguage() {
  const chooseLanguage = Cookies.get('language')
  if (chooseLanguage) return chooseLanguage

  // if has not choose language
  const language = (navigator.language || navigator.browserLanguage).toLowerCase()
  const locales = Object.keys(messages)
  for (const locale of locales) {
    if (language.indexOf(locale) > -1) {
      return locale
    }
  }
  return 'en'
}
const i18n = new VueI18n({
  // set locale
  // options: en | zh | es
  locale: getLanguage(),
  // set locale messages
  messages
})

export default i18n

/util/get-page-title.js

import defaultSettings from '@/settings'
import i18n from '@/lang'

const title = defaultSettings.title || 'Vue Element Admin'

export default function getPageTitle(key) {
  const hasKey = i18n.te(`route.${key}`)
  if (hasKey) {
    const pageName = i18n.t(`route.${key}`)
    return `${pageName} - ${title}`
  }
  return `${title}`
}

in router.beforeEach

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)
})

but in vue3 this style is not ,how to set document.title in i18n next.

[polinwei]

You should use

i18n.global.t(`route.${key}`)


[xibman]

If you have multi language you can do this

const {
global: { locale, t },
} = i18n;

meta: {
title: computed(() => t('pages.unauthorized.metaTitle')),
},