🐛 bug(install): fix cannot redfine error

kazupon · Sep 25, 2018 · 6d5ec61 · 6d5ec61
1 parent 40bcdef
commit 6d5ec61
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/src/install.js b/src/install.js
@@ -7,16 +7,16 @@ import { bind, update, unbind } from './directive'
 export let Vue
 
 export function install (_Vue) {
-  Vue = _Vue
-
-  const version = (Vue.version && Number(Vue.version.split('.')[0])) || -1
   /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && install.installed) {
+  if (process.env.NODE_ENV !== 'production' && install.installed && _Vue === Vue) {
     warn('already installed.')
     return
   }
   install.installed = true
 
+  Vue = _Vue
+
+  const version = (Vue.version && Number(Vue.version.split('.')[0])) || -1
   /* istanbul ignore if */
   if (process.env.NODE_ENV !== 'production' && version < 2) {
     warn(`vue-i18n (${install.version}) need to use Vue 2.0 or later (Vue: ${Vue.version}).`)