Add Excel Import Code. We need to create an instance of the client-side ExcelIO component that we can use to actually open the file: var excelIO = new GC.Spread.Excel.IO (); Then we need to add a function to import a file. In this example, we import a local file, but you can do the same thing with a file on a server.
js-xlsx : preserve cell style while writing to .xlsx file. I have manually created a .xlsx file. I have added different colors to some rows and some of the cells have custom date format. I am using js-xlsx npm module to read data from .xlsx file. While writing back to the same .xlsx file to update some cell values, the selected colors and date ...