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

Thanks @Jacob Krall for pointing out the reason:

I was getting the same error for following code

this.http.post(URL, formData).map((res: Response) => res.json()).subscribe(
(success) => {
    alert(success);
},
(error) => alert(error))

Reason: I was not sending json data from server itself so it was crashing for line res.json()

Solution: Return json response from server then it should work fine.

replaced the following

return res.send("Upload Completed for " + path);

with,

return res.json("Upload Completed for " + path);