From f0e4748841b95c1041cc445875d8930d77ea061a Mon Sep 17 00:00:00 2001
From: Alexey Simakov <a.simakov@inventos.ru>
Date: Tue, 11 Aug 2020 16:53:54 +0300
Subject: [PATCH] Merge cells xlsx

---
 lib/xlsx/genxlsx.js   | 11 +++++++++--
 manual/xlsx/README.md |  9 +++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/xlsx/genxlsx.js b/lib/xlsx/genxlsx.js
index 36ba0129..1dd67fb2 100644
--- a/lib/xlsx/genxlsx.js
+++ b/lib/xlsx/genxlsx.js
@@ -511,8 +511,15 @@ function makeXlsx(genobj, new_type, options, gen_private, type_info) {
       } // Endif.
     } // End of for loop.
 
-    outString +=
-      '</sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></worksheet>'
+    outString += '</sheetData>'
+    if (data.sheet.mergeCells && data.sheet.mergeCells.length > 0) {
+      outString += '<mergeCells count="'+data.sheet.mergeCells.length+'">'
+      for (var mergeIndex = 0; mergeIndex < data.sheet.mergeCells.length; mergeIndex++) {
+        outString += '<mergeCell ref="'+data.sheet.mergeCells[mergeIndex]+'"/>'
+      }
+      outString += '</mergeCells>'
+    }
+    outString += '<pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></worksheet>'
     return outString
   }
 
diff --git a/manual/xlsx/README.md b/manual/xlsx/README.md
index 27ea8d98..5b765ba0 100644
--- a/manual/xlsx/README.md
+++ b/manual/xlsx/README.md
@@ -67,3 +67,12 @@ sheet.data[1] = [];
 sheet.data[1][3] = 'abc';
 ```
 
+Merge cells:
+
+```js
+sheet.mergeCells = ['A3:E3'];
+// or some
+sheet.mergeCells = ['B4:D4', 'C5:C6'];
+
+```
+