add esline

src/i18n/index.js

@@ -1,19 +1,19 @@
-import ZHCN from "./zh-CN";
-import ZHTW from "./zh-TW";
-import EN from "./en";
-import JP from "./jp";
+import ZHCN from './zh-CN';
+import ZHTW from './zh-TW';
+import EN from './en';
+import JP from './jp';
 
 const i18nMap = {
-  "zh": ZHCN,
-  "zh-CN": ZHCN,
-  "zh-TW": ZHTW,
-  "en": EN,
-  "jp": JP
+  zh: ZHCN,
+  'zh-CN': ZHCN,
+  'zh-TW': ZHTW,
+  en: EN,
+  jp: JP
 };
 
 export default class I18n {
   constructor({ option }) {
-    this.language = i18nMap[option.language || "en"];
+    this.language = i18nMap[option.language] || i18nMap.en;
   }
 
   get(key) {