Importing Microsoft Excel to Google Spreadsheet using Custom Function with Google Apps Script
This is a sample script for importing Microsoft Excel (XLSX) data to Google Spreadsheet using a custom function with Google Apps Script.
Usage
1. Install SheetJS library.
Please copy the script of the SheetJS library from https://cdn.sheetjs.com/xlsx-latest/package/dist/xlsx.full.min.js, and paste the script to the script editor of Google Spreadsheet, and save the script.
In this case, I would like to recommend the following flow.