JSforce Bulk API Sample Code

bulkSample1.js

batch.on("response", function(rets) { // fired when batch finished and result retrieved
  console.log('response');
  console.log(rets);
  for (var i=0; i < rets.length; i++) {
    if (rets[i].success) {
      console.log("#" + (i+1) + " loaded successfully, id = " + rets[i].id);
    } else {
      console.log("#" + (i+1) + " error occurred, message = " + rets[i].errors.join(', '));
    }
  }
});

bulkSample2.js

conn.bulk.load("Account", "insert", accounts, function(err, rets) {
  console.log('load');
  console.log(rets);
  if (err) { return console.error(err); }
  for (var i=0; i < rets.length; i++) {
    if (rets[i].success) {
      console.log("#" + (i+1) + " loaded successfully, id = " + rets[i].id);
    } else {
      console.log("#" + (i+1) + " error occurred, message = " + rets[i].errors.join(', '));
    }
  }
});