Why i am getting the error: unexpected token h in JSON at position 0? [Solved]

Question

So i am making request to this server and getting data from it using the following code but I get the above mentioned error ,so can anybody tell me why is it so and how can I solve it ,also using res.text() works fine,thank you in advance!

const fet=require("node-fetch");
fet('http://localhost:9000/')
.then(res=>res.json())
.then(body=>console.log(body));

https://code.sololearn.com/c7leBCM7fiHI/?ref=app

Answer 1

because "hello" is not in JSON format
maybe it should look like this
{"mesage":"hello"}

Answer 2

change the res.write to json instread of plain string

JSON.stringify({message:"hello"})
or
'{"mesage":"hello"}'

Answer 3

Taste so can you pls tell what changes I need to make in both of the codes ?