From 1ff05605228a1ff4dcabc36a14a5497199d19a1c Mon Sep 17 00:00:00 2001
From: toruksmakto <42709228+toruksmakto@users.noreply.github.com>
Date: Tue, 19 Mar 2019 18:01:21 +0800
Subject: [PATCH] Excel Export Error

`Uncaught (in promise) TypeError: Cannot read property 'length' of undefined`
Details: https://panjiachen.github.io/vue-element-admin/#/excel/export-excel
---
 src/vendor/Export2Excel.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vendor/Export2Excel.js b/src/vendor/Export2Excel.js
index 3fda4465..d93c4ff6 100644
--- a/src/vendor/Export2Excel.js
+++ b/src/vendor/Export2Excel.js
@@ -145,11 +145,11 @@ export function export_table_to_excel(id) {
 }
 
 export function export_json_to_excel({
-  multiHeader,
+  multiHeader = [],
   header,
   data,
   filename,
-  merges,
+  merges = [],
   autoWidth = true,
   bookType=  'xlsx'
 } = {}) {