react

由于React Intl v2不再支持嵌套的消息对象，因此需要对消息进行展平。

export const flattenMessages = ((nestedMessages, prefix = '') => {  if (nestedMessages === null) {    return {}  }  return Object.keys(nestedMessages).reduce((messages, key) => {    const value       = nestedMessages[key]    const prefixedKey = prefix ? `${prefix}.${key}` : key    if (typeof value === 'string') {      Object.assign(messages, { [prefixedKey]: value })    } else {      Object.assign(messages, flattenMessages(value, prefixedKey))    }    return messages  }, {})})// Use flattenMessages<IntlProvider locale={locale} messages={flattenMessages(messagesForLocale)}>

参考：

• https://github.com/yahoo/react-intl/wiki/Upgrade-Guide#flatten-messages-object
• https://github.com/yahoo/react-intl/issues/162#issuecomment-139683466