Uncaught SyntaxError: Unexpected token U in JSON at position 0 at JSON.parse () at Response.Body.json

Question

I am working on an angular2 project. I am stuck with these errors. The error occured when I tried to send the JSON objects to the backend. It may be due the parsing of JSON obje

Answer 1

Read the call stack closely; the crash is on this line:

        .map(res=> res.json());

The JSON parser is failing to understand the response from the server. See if you can figure out what response the server (the POST to http://localhost:3000/api/users) is sending back. The response supposedly starts with 'U', which cannot be valid JSON.