vue3使用vue-i18n的方法详解(ts中使用$t, vue3不用this)

npm install vue-i18n@next 或 yarn add vue-i18n@next

import App from '@/App.vue'
import { createApp } from 'vue'
import { createI18n } from 'vue-i18n'
import enLocale from './en/index';
import zhLocale from './zh/index';

const messages = {
    zh: zhLocale,
    cn: zhLocale,
    en: enLocale,
    us: enLocale,
    
}

const localLang = navigator.language.split('-')[0];
const storageLang = window.localStorage.getItem('locale')?.split('"')[1].split('"')[0].toLocaleLowerCase() || 'en';
const c = (storageLang.toLocaleLowerCase() !== 'zh' && storageLang.toLocaleLowerCase() !== 'en') ? 'en' : storageLang;

const i18n = createI18n({
    globalInjection: true, //全局生效$t
    locale: c || localLang || 'en',
    messages,
    legacy: false,
})

const app = createApp(App)
app.use(i18n)

export default {
    nNation: 'Country/Region',
    pleaseInput: 'Account',

}

import { getCurrentInstance } from "vue";
const { appContext : { config: { globalProperties } } } = getCurrentInstance();  // 这里可以根据需要写个hook
console.log(globalProperties.$t('pleaseSelectNation'))

<span>{{ $t("nation") }}</span>