Below we illustrate how you might import an Excel spreadsheet into AG Grid using a third-party library - in this example we're using xlsx.
Auto-Generate Columns is used so no column definitions need to be provided upfront — columns are created from the imported data. The processFileInput callback parses dropped Excel files using the same library.
Click Load Sample Excel to fetch a sample spreadsheet, or drag your own .xlsx file onto the grid. Click Upload File to re-show the file input overlay. The spreadsheet can also be downloaded here.