JSON.parse() 错误 SyntaxError: Unexpected token < in JSON at position 0

Question

I'm following along this udemy course on fullstack webdev. Fun so far until I hit this snag.

This lesson is about API and JSON and we are making a "Sign Up" email service using Mailchimp API.

I have the following constant:

And when using nodemon this is the error I get:

That app.js 43:24 points to the: console.log(JSON.parse(data)); line.

I've checked my api key and that's correct, the options and url are set correctly.

I've been scrathing my head over this one.

Any ideas where to begin troubleshooting?

Answer 1

Can you do console.log(data) once and validate that data is not undefined .

If we do JSON.parse(undefined) , we get the same error as the one you are getting. You can put an if block to see if data is not undefined and then selectively parse.

Answer 2

if(data != null){
  console.log(JSON.Parse(data);
}

Check the data.

Answer 3

You don't need of JSON.parse(data) it because the data is already in JSON .

Answer 4

Ok guys, Thank you so much for your support and ideas for troubleshooting. Here is what I did to troubleshoot:

console.log(response.statusCode); & console.log(data); from this, I go a status code 404 and a hex for the HTML that Mailchimp uses for the 404 page. I revised the script again and found the issue and corrected it. Now it works as intended.

Edit1: To add to some of the answers in this post, it seems that if you just use console.log(data); you end viewing a hex response. storing the data and using stringify const response= JSON.stringify(data); returns decimal value. So to console.log the data it does seem that you have to use console.log(JSON.parse(data));

Thank you all again for your help.