Spreadsheet
File Format APIs for JavaScript
Open Source JavaScript APIs for Spreadsheets
Read, Write & Manipulate Microsoft Excel files via JavaScript.
Spreadsheet File Format APIs for JavaScript Include
SheetJS JS-XLSX
Pure JavaScript implementation allows software developers to export, read and write the most popular format of Excel spreadsheets inside web browsers and servers.
xlsx-populate
Open Source JavaScript API to Populate Excel data from a sheet, add/edit/move/delete worksheet, XLSX agile encryption or decryption and much more.