I was doing CSV but couldn't get multiple files into the same sheet (tabs). I had 20 CSVs to download I didn't need 20 different files. I work in JSON mostly

I was doing CSV but couldn't get multiple files into the same sheet (tabs). I had 20 CSVs to download I didn't need 20 different files. I work in JSON mostly do wrapped the excellent XLSX library it was very useful https://goo.gl/S7rlFm https://goo.gl/S7rlFm