Sharing experience in internationalization processing in Vue project development

With the rapid development of the Internet, more and more companies are focusing on overseas markets. In order to adapt to the needs of users in different countries and regions, developers need to master how to deal with internationalization issues. This article will share some of my internationalization experience in Vue project development.

1. Understand the importance of internationalization
Internationalization refers to the process of adapting a program or product to the language, culture and habits of different countries and regions. During the development process, you need to consider how to handle issues such as multiple languages, date formats, currency symbols, etc. Internationalization can help us better meet the needs of different users, improve user experience, and expand market share.

2. Use the Vue-i18n plug-in
Vue-i18n is an international plug-in for Vue.js that can help us achieve multi-language support. First, we need to install the Vue-i18n plug-in, introduce and configure it in main.js.

import VueI18n from 'vue-i18n'
import locale from 'element-ui/lib/locale' // （可选）在使用ElementUI时，需要引入element-ui的locale模块

Vue.use(VueI18n)

const i18n = new VueI18n({
  locale: 'en', // 默认语言
  fallbackLocale: 'en', // 当未找到指定语言时使用的语言
  messages: {
    en: require('./locales/en.json'), // 英文语言包
    zh: require('./locales/zh.json'), // 中文语言包
  }
})

locale.i18n((key, value) => i18n.t(key, value)) // （可选）在使用ElementUI时，需要使用ElementUI的i18n函数

We store multi-language text content in json files in the locales folder to facilitate maintenance and management.

3. Switching Language
In Vue projects, there are generally two ways to switch languages: manual switching and automatic switching according to user preferences.

1. Manual switching
   We can add a language switching button to the page and switch the language by calling the locale method of i18n.

methods: {
  changeLanguage(lang) {
    this.$i18n.locale = lang
  }
}

2. Automatically switch according to user preference
   We can obtain the user's preferred language through the browser's navigator object, and automatically switch languages ​​based on the preferred language .

const browserLanguage = navigator.language || navigator.userLanguage
const language = browserLanguage.toLowerCase()

if (i18n.locale !== language) {
  i18n.locale = language
}

4. Processing date and currency formats
In the process of internationalization, the processing of date and currency formats is also very important. The Vue-i18n plugin provides $d and $n methods to handle date and currency formats.

{{ $d(new Date(), 'short') }} // 使用默认的格式

{{ $d(new Date(), { year: 'numeric', month: 'long', day: 'numeric' }) }} // 使用自定义的格式

{{ $n(1000) }} // 使用默认的格式

{{ $n(1000, { style: 'currency', currency: 'USD' }) }} // 使用自定义的格式

5. Translate text
In the Vue project, we can use the $t method to translate text. We can use {{$t('key')}} directly in the Vue component template to translate text, or we can use this.$t('key' in the method of the Vue component ) to translate the text.

6. Conclusion
Internationalization is a very important part of Vue project development. It can help us better meet the needs of different users and improve user experience. This article shares some of my experience in internationalization processing in Vue project development, including using the Vue-i18n plug-in, switching languages, processing date and currency formats, translating text, etc. I hope it will be helpful to everyone in dealing with internationalization issues in Vue project development.

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