TypeError Converting circular structure to JSON in nodejs

Question

Code :

 var formData = ({first_name:firstname,last_name:lastname,user_name:username, email:email,password:password});


  request.post({url:'http://localhost:8081/register', JSON: formData}, function(err, connection, body) {


exports.Register = function(req, res) {

    res.header("Access-Control-Allow-Origin", "*");

    console.log("Request data " +JSON.stringify(req));

This is a request package for node.js. But I am getting this error in return:

TypeError: Converting circular structure to JSON

Can someone help me with this?

Answer 1

The issue is that Javascript won't accept circular objects. If it has a reference of JSON.stringify() then it will throw an error. What you need to do is to log the object to the console,  you can use the console's native stringifying and avoid using JSON:

console.log("Request data:");
console.log(req);

I hope this helps you.