Upload CSV (Excel spreadsheet) data to a listening Node.js controller.

upload-data-controller.js

var request = require("request"),
    csv = require("csv");

module.exports = function(app) {
    // accepts the POST form submit of the CSV file
    app.post("/upload/data", function(req, res) {
        // the name under "files" must correspond to the name of the
        // file input field in the submitted form (here: "csvdata")
        csv().from.path(req.files.csvdata.path, {
            delimiter: ",",
            escape: '"'
        })
        // when a record is found in the CSV file (a row)
        .on("record", function(row, index) {
            var firstName, lastName;

            // skip the header row
            if (index === 0) {
                return;
            }

            // read in the data from the row
            firstName = row[0].trim();
            lastName = row[1].trim();

            // perform some operation with the data
            // ...
        })
        // when the end of the CSV document is reached
        .on("end", function() {
            // redirect back to the root
            res.redirect("/");
        })
        // if any errors occur
        .on("error", function(error) {
            console.log(error.message);
        });
    });
};

upload-data.html

<section id="upload-data-panel">
    <form id="upload-form" action="/upload/data" method="post" enctype="multipart/form-data">
        <fieldset>
            <legend>Upload Data</legend>
            <div>
                <!-- The name here is important, and will be used later to reference the data -->
                <input type="file" name="csvdata" accept="text/cvs">
            </div>
            <div>
                <input type="submit" value="Submit"/>
            </div>
        </fieldset>
    </form>
</section>

am unable to understand your above code about how to run this ? could you pls open repo/tutorial for how upload csv using MEAN stack and how to load csv data from db to html/view page(table)?

Thank you...

don't mention 'action="/upload/data"' in form. It will redirected to another page.
So please use controller or services to upload a file.