upload image to node js server + javascript and display in the same page with ajax jquery

I need to upload a image(jpg||png||jpeg) to the server I created with node js.

I have the router and the requestHandlers.. that redirect to this function:

  function reqUpload(request, response) {
    var form = new formidable.IncomingForm();
    form.parse(request, function (error, fields, files) {
        lastFileUploaded=files.up.originalFilename;
        if (files.up.originalFilename.match(/.(jpg|jpeg|png)$/i)) {
            //check if alredy exists
            fs.access(files.up.originalFilename, fs.F_OK, (err) => {
                if (err) {
                    fs.rename(files.up.filepath, files.up.originalFilename, function (err) {
                        if (err) {
                            fs.unlink(files.up.originalFilename);
                            fs.rename(files.up.filepath, files.up.originalFilename);
                        }

                        var data;
                        fs.readFile('./html/std.html', 'utf8', function (err, data) {
                            if (err) {
                                console.error(err);
                                return
                            }
                            response.writeHead(200, { "Content-Type": "text/html" });
                            response.write(data);
                            response.end();
                            
                        });
                    })
                }else{
                    console.log("Already exists, replacing it!");
                    fs.rename(files.up.filepath, files.up.originalFilename, function (err) {
                        if (err) {
                            fs.unlink(files.up.originalFilename);
                            fs.rename(files.up.filepath, files.up.originalFilename);
                        }
                })}

            });
        } else {
            console.log("format not accepted! try again.");

        }

This is working if I upload my file via a button and the form action =”/reqUpload”
however, I need to load in the same page.

How do I do it with ajax + jquery?

I need to display the image uploaded in the same page I uploaded it, without refreshing the page.