diff --git a/src/mixins/popup/index.js b/src/mixins/popup/index.js
index db8870947..b7a9a7741 100644
--- a/src/mixins/popup/index.js
+++ b/src/mixins/popup/index.js
@@ -1,7 +1,19 @@
+import Vue from 'vue';
 import merge from 'src/utils/merge';
 import PopupManager from './popup-manager';
 
-let idSeed = 1;
+let popupContext;
+if (Vue.prototype.$isServer) {
+  popupContext = global.popupContext || {};
+  global.popupContext = popupContext;
+} else {
+  popupContext = window.popupContext || {};
+  window.popupContext = popupContext;
+}
+
+popupContext = merge(popupContext, {
+  idSeed: 1
+});
 
 const getDOM = function(dom) {
   if (dom.nodeType === 3) {
@@ -58,7 +70,7 @@ export default {
   },
 
   beforeMount() {
-    this._popupId = 'popup-' + idSeed++;
+    this._popupId = 'popup-' + popupContext.idSeed++;
     PopupManager.register(this._popupId, this);
   },
 
diff --git a/src/mixins/popup/popup-manager.js b/src/mixins/popup/popup-manager.js
index 7cdbf0f42..4fea88a08 100644
--- a/src/mixins/popup/popup-manager.js
+++ b/src/mixins/popup/popup-manager.js
@@ -1,17 +1,21 @@
 import Vue from 'vue';
+import merge from 'src/utils/merge';
 import { addClass } from 'src/utils/dom';
 
-let popupContext = {
+let popupContext;
+if (Vue.prototype.$isServer) {
+  popupContext = global.popupContext || {};
+  global.popupContext = popupContext;
+} else {
+  popupContext = window.popupContext || {};
+  window.popupContext = popupContext;
+}
+
+popupContext = merge(popupContext, {
   hasModal: false,
   instances: {},
   modalStack: []
-};
-
-if (Vue.prototype.$isServer) {
-  global.popupContext = popupContext;
-} else {
-  window.popupContext = popupContext;
-}
+});
 
 const getModal = function() {
   let modalDom = PopupManager.modalDom;