From 105888d103c6a2452a586a7a715714da3b65abf2 Mon Sep 17 00:00:00 2001
From: kazuya kawaguchi <kawakazu80@gmail.com>
Date: Mon, 18 Jun 2018 20:08:38 +0900
Subject: [PATCH] :bug: bug(directive): fix cannot unbind bug

closes #377
---
 src/directive.js         | 10 +++++++++
 src/install.js           |  4 ++--
 test/unit/issues.test.js | 47 +++++++++++++++++++++++++++++++++++++++-
 3 files changed, 58 insertions(+), 3 deletions(-)

diff --git a/src/directive.js b/src/directive.js
index cb9b70c2e..bd09689f1 100644
--- a/src/directive.js
+++ b/src/directive.js
@@ -16,6 +16,16 @@ export function update (el: any, binding: Object, vnode: any, oldVNode: any): vo
   t(el, binding, vnode)
 }
 
+export function unbind (el: any, binding: Object, vnode: any, oldVNode: any): void {
+  if (!assert(el, vnode)) { return }
+
+  el.textContent = ''
+  el._vt = undefined
+  delete el['_vt']
+  el._locale = undefined
+  delete el['_locale']
+}
+
 function assert (el: any, vnode: any): boolean {
   const vm: any = vnode.context
   if (!vm) {
diff --git a/src/install.js b/src/install.js
index 6ac4e473b..750206eeb 100644
--- a/src/install.js
+++ b/src/install.js
@@ -2,7 +2,7 @@ import { warn } from './util'
 import extend from './extend'
 import mixin from './mixin'
 import component from './component'
-import { bind, update } from './directive'
+import { bind, update, unbind } from './directive'
 
 export let Vue
 
@@ -29,7 +29,7 @@ export function install (_Vue) {
 
   extend(Vue)
   Vue.mixin(mixin)
-  Vue.directive('t', { bind, update })
+  Vue.directive('t', { bind, update, unbind })
   Vue.component(component.name, component)
 
   // use object-based merge strategy
diff --git a/test/unit/issues.test.js b/test/unit/issues.test.js
index 0b0791ac6..782d391a1 100644
--- a/test/unit/issues.test.js
+++ b/test/unit/issues.test.js
@@ -1,5 +1,6 @@
 import messages from './fixture/index'
 import { parse } from '../../src/format'
+const compiler = require('vue-template-compiler')
 
 describe('issues', () => {
   let vm, i18n
@@ -287,7 +288,7 @@ describe('issues', () => {
   })
 
   describe('#259', () => {
-    it('this points to the right', (done) => {
+    it('this points to the right', done => {
       const vm = new Vue({
         i18n: new VueI18n({
           locale: 'en',
@@ -314,4 +315,48 @@ describe('issues', () => {
       done()
     })
   })
+
+  describe('#377', () => {
+    it('should be destroyed', done => {
+      const el = document.createElement('div')
+      const template = `<div id="app">
+        <p>TIMEOUT : {{ timeout }}</p>
+        <div ref="el1" v-if="!timeout">
+          <span v-t="'SHOULD_NOT_DISPLAY_WHEN_TIMEOUT_EQUAL_TRUE'"></span>
+        </div>
+        <div ref="el2" v-if="timeout">
+          <span class="">{{ $t('CANNOT_REPRODUCE_WITHOUT_THIS') }}</span>
+        </div>
+      </div>`
+      const { render, staticRenderFns } = compiler.compileToFunctions(template)
+      const vm = new Vue({
+        i18n: new VueI18n({ locale: 'id' }),
+        data () {
+          return { timeout: false }
+        },
+        methods: {
+          startLoading: function () {
+            this.timeout = true
+            setTimeout(() => {
+              this.timeout = false
+            }, 100)
+          }
+        },
+        render,
+        staticRenderFns
+      }).$mount(el)
+
+      Vue.nextTick(() => {
+        assert.equal(vm.$refs.el1.outerHTML, '<div><span>SHOULD_NOT_DISPLAY_WHEN_TIMEOUT_EQUAL_TRUE</span></div>')
+        vm.startLoading()
+        delay(50).then(() => {
+          assert.equal(vm.$refs.el2.outerHTML, '<div><span>CANNOT_REPRODUCE_WITHOUT_THIS</span></div>')
+          delay(60).then(() => {
+            assert.equal(vm.$refs.el1.outerHTML, '<div><span>SHOULD_NOT_DISPLAY_WHEN_TIMEOUT_EQUAL_TRUE</span></div>')
+            done()
+          })
+        })
+      })
+    })
+  })
 })