Download File using express and fetch doesn’t work

I try to download a file using nodejs and Javascript.
When I call the URL in the Browser, the file gets downloaded.
When I call this Endpoint in my javascript file using fetch, the download doesn’t work

NodeJS Endpoint

app.get("/download", function (req, res, next) {
    res.download(
        filepath
    );
});

Javascript Call

const downloadFile = async (path) => {
await fetch("http://localhost:8080/download", {
    method: "Get",
})
    .then((response) => {
        console.log(response);
    })
    .catch((error) => {
        console.log(error);
    });

};

Do you have any suggestions?

Thank you very much!