1. **SPARQL Query Execution in JS** Use `fetch()` or a library like [`comunica`](https://comunica.dev/) or [`rdflib.js]`](https://github.com/linkeddata/rdflib.js) to send the SPARQL query to the endpoint. 2. **Parsing Results** Most endpoints return results in JSON (`application/sparql-results+json`), which is easy to parse in JS. 3. **Generating Excel File** Use a library like [`xlsx`](https://github.com/SheetJS/sheetjs) (SheetJS) to convert JSON to an Excel file (`.xlsx` or `.xls`), which can then be offered as a download.
fetch()or a library likecomunicaorrdflib.js]to send the SPARQL query to the endpoint.application/sparql-results+json), which is easy to parse in JS.xlsx(SheetJS) to convert JSON to an Excel file (.xlsxor.xls), which can then be offered as a download.