react-i18next

• 文档地址：https://react.i18next.com/

• 安装包：npm install react-i18next i18next --save

• 添加语言包配置文件：

  
  
  image.png

  • en-US.json

    {
      "用户名": "username",
      "头像": "avatar",
      "语言": {
        "切换到中文": "change to Chinese",
        "切换到英文": "change to English"
      }
    }
    

  • zh-CN.json

     {
      "用户名": "用户名",
      "头像": "头像",
      "语言": {
        "切换到中文": "切换到中文",
        "切换到英文": "切换到英文"
      }
    }
    

  • i18n.js

    import i18n from 'i18next'
    import { initReactI18next } from 'react-i18next'
    import enUS from './en_US.json'
    import zh from './zh_CN.json'
    
    const resources = {
      'en-US': {
        translation: enUS,
      },
      'zh-CN': {
        translation: zh,
      },
    }
    
    let localLang = localStorage.getItem('lang')
    if (!localLang) {
      const browserLanguage = navigator.language || navigator.userLanguage
      localLang = browserLanguage === 'zh-CN' ? 'zh-CN' : 'en-US'
    }
    
    i18n
      .use(initReactI18next)
      .init({
        resources,
        lng: localLang,
        interpolation: {
          escapeValue: false,
        },
      })
    
    export default i18n
    

• 将i18n.js文件引入到入口文件中src/index.js
import './assets/locales/i18n'

• 在src/App.js文件中配置antd语言包

import React from 'react'
import { ConfigProvider } from 'antd'
import { useTranslation } from 'react-i18next'
import zhCN from 'antd/locale/zh_CN'
import enUS from 'antd/locale/en_US'

const App = () => {
  const { i18n } = useTranslation()

  return (
    <ConfigProvider locale={i18n.language === "zh-CN" ? zhCN : enUS}>
      <div>
        ......
      </div>
    </ConfigProvider>
  )
}
export default App

• 渲染组件

  • useTranslation (hook)

    import React from 'react'
    import { useTranslation } from 'react-i18next'
    
    const RenderByHook = () => {
      const [t, i18n] = useTranslation()
    
      return <div>{t('语言.hook')}</div>
    }
    
    export default RenderByHook
    

  • withTranslation (HOC)

    import React from 'react'
    import { withTranslation } from 'react-i18next'
    
    const RenderByHoc = ({ t, i18n }) => {
      return <div>{t('语言.hoc')}</div>
    }
    
    export default withTranslation()(RenderByHoc)
    

  • Translation (render prop)

    import React from 'react'
    import { Translation } from 'react-i18next'
    
    const RenderByProps = () => {
      return (
        <Translation>
          {
            (t, { i18n }) => <div>{t('语言.renderProps')}</div>
          }
        </Translation>
      )
    }
    
    export default RenderByProps
    

• 切换语言

  import React from 'react'
  import { Button } from 'antd'
  import { useTranslation } from 'react-i18next'
  
  export default () => {
    const [t, i18n] = useTranslation()
  
    const isZhCN = i18n.language === "zh-CN"
  
    const toggleI18n = () => {
      const locale = isZhCN ? "en-US" : "zh-CN"
      localStorage.setItem('lang', locale)
      i18n.changeLanguage(locale)
    }
  
    return (
      <Button type="primary" onClick={toggleI18n}>
        {isZhCN ? t('语言.切换到英文') : t('语言.切换到中文')}
      </Button>
    )
  }
  

react-intl

• 文档地址：https://formatjs.io/docs/getting-started/installation/

• 安装包：npm i -S react react-intl

• 添加语言包配置文件：

  • 与react-i18next不同的是，语言包文件类型为js，导出一个对象

• 渲染组件

  • intl.formatMessage()
  • <FormattedMessage id='welcome' />

• 切换语言

  • 手动实现