vue2+elementUI+i18n 国际化语言切换实现

1.准备
安装：yarn add vue-i18n -S
或者 npm install vue-i18n -S
在main.js中引入

import i18n from './i18n/i18n';
new Vue({
  router,
  store,
  i18n, 
  render: h => h(App)
}).$mount('#app')

2.目录结构

i18n.js

import Vue from 'vue'
import locale from 'element-ui/lib/locale';
import VueI18n from 'vue-i18n'
import messages from './langs'
Vue.use(VueI18n)
//从localStorage获取语言选择。
const i18n = new VueI18n({
    locale: localStorage.lang || 'cn', //初始未选择默认 cn 中文
    messages,
})
locale.i18n((key, value) => i18n.t(key, value)) //兼容element

export default i18n

---

index.js

import en from './en';
import cn from './cn';
export default {
    en: en,
    cn: cn
}

---

cn.js

import zhLocale from 'element-ui/lib/locale/lang/zh-CN' //引入element语言包
const cn = {
    message: {
        'text': '耿大大',
    },
    ...zhLocale
}

export default cn;

---

en.js

import enLocale from 'element-ui/lib/locale/lang/en' //引入element语言包
const en = {
    message: {
        'text': 'geng da da',
    },
    ...enLocale
}

export default en;

---

HelloWorld.vue组件中引入

<template>
  <div>
    <span>{{$t('message.text')}}</span><br/>
    <el-select v-model="selectValue" @change="langChange" placeholder="请选择">
      <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option>
    </el-select>
  </div>
</template>
 
<script>
export default {
  data() {
    return {
      selectValue: "",
      options: [
        {
          value: "cn",
          label: "中文"
        },
        {
          value: "en",
          label: "English"
        }
      ]
    };
  },
  created() {
    let that = this;
    console.log(localStorage.lang);
    that.selectValue =
      localStorage.lang == undefined ? "cn" : localStorage.lang;
  },
  methods: {
    //语言切换
    langChange(e) {
      console.log(e)
      localStorage.setItem("lang", e);
      console.log(this.$i18n)
      this.$i18n.locale = e;
    }
  }
};
</script>