no message

Former-commit-id: 5ac0195c919b534d433ad1fddf85157c89a18a37
Former-commit-id: 1b1ac31df43769fb04c6a1e8d0a3fa5f716b6d86
Former-commit-id: 84ee88472c181b4810b2f7430809f1f54472de3d

src/i18n/index.js

@@ -7,6 +7,7 @@ export default new VueI18n({
   locale: 'CN',
   messages: {
     'CN': require('./lang/cn'),
+    'JA': require('./lang/ja'),
     'EN': require('./lang/en')
   }
 })

src/i18n/lang/ja.js

@@ -0,0 +1,3 @@
+export const message = {
+  hello: 'こんにちは、世界'
+}

src/pages/demo/plugins/vue-i18n/components/DemoI18nControl.vue

@@ -2,6 +2,7 @@
   <div class="dd-mb">
     <el-radio-group v-model="lang" @change="handleChange">
       <el-radio-button label="CN">中文</el-radio-button>
+      <el-radio-button label="JA">日本語</el-radio-button>
       <el-radio-button label="EN">English</el-radio-button>
     </el-radio-group>
   </div>