excel office scripts documentation
async function main(context: Excel.RequestContext) { // Get the cells at A1 and B1. let dateRange = context.workbook.worksheets.getActiveWorksheet().getRange("A1"); let timeRange = context.workbook.worksheets.getActiveWorksheet().getRange("B1"); // Get the current date and time with the JavaScript Date object. let date = new Date(Date.now()); // Add the date string to A1. dateRange.values = [[date.toLocaleDateString()]]; // Add the time string to B1. timeRange.values = [[date.toLocaleTimeString()]]; }