how to show all console.log from node.js in heroku?

Question

I have deployed a node.js application to node.js but not able to see the complete console.log statements from my app. I am using:

heroku logs

Some of the logging is shown but looks like it is not the complete logs. Is there a node.js package to send emails from the deployed app? Email works fine from my localmachine btw.

Email code:

console.log('try to send email hold on');
    var nodemailer = require("nodemailer");
    var smtpTransport = nodemailer.createTransport({
        service: "Gmail",
        auth: {
            user: "[email protected]",
            pass: "mypw"
        }
    });

    smtpTransport.sendMail({
        from: "Dikkebil", // sender address
        to: "[email protected]", // comma separated list of receivers
        subject: "Error body", // Subject line
        text: 'Error body: ' +error.body+ '\n'+ 'error type:' + error.type +'\n' +'error statuscode:' +error.statusCode +'\n'  + 'error args:' + error.arguments[0]
    }, function(error, response){
        if(error){
            console.log(error);
        }else{
            console.log("Message sent: " + response.message);
        }
    });

Answer 1

From the heroku doc:

The logs command retrieves 100 log lines by default. You can specify the number of log lines to retrieve (up to a maximum of 1,500 lines) by using the --num (or -n) option.

$ heroku logs -n 200

So probably you need to request more lines with -noption.

As per comment received, you can also stream the current log with:

$ heroku logs --tail

Please look at the doc