Learn about the various data sources supported by Aspose.Cells for JavaScript via C++. Our guide will walk you through the different types of data sources available and show you how to connect and retrieve data from them to populate your worksheets....type = "file" id = "fileInput" accept = ".xls,.xlsx,.csv" /> < button...type = "file" id = "fileInput" accept = ".xls,.xlsx,.csv" /> < button...