importing excel using javascript

Actually i have done one sample project using node.js and mongoDB which allows users to save comments and now i am doing exporting and importing

On click of export button it will download a excel file with username and comment fields and user have to write username and comment in downloaded excel file and now on click of import button it will display a dialog box an it will show a button choose file..here we need to select and upload the excel

on successful upload the data will be stored in mongoDB database.

i have done exporting excel using javascript,npm libraries and now i want to import the excel data and store it in mongoDB.

can any one pls help mee how to import excel and store data in mongodb....

I've done import with .csv using ya-csv.

node-csv is another popular project but its API is too difficult for me to cope with.

PS: I'm interested in how you export your data to Excel, is it in .xls or .csv?