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[Solved] Uncaught SyntaxError: Unexpected token u in JSON at position 0

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Uncaught SyntaxError: Unexpected token u in JSON at position 0 in javascript. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How Uncaught SyntaxError: Unexpected token u in JSON at position 0 Error Occurs?

Today I get the following error Uncaught SyntaxError: Unexpected token u in JSON at position 0 in javascript.

How To Solve Uncaught SyntaxError: Unexpected token u in JSON at position 0 Error ?

  1. How To Solve Uncaught SyntaxError: Unexpected token u in JSON at position 0 Error ?

    To Solve Uncaught SyntaxError: Unexpected token u in JSON at position 0 Error the “u” there is the first letter of undefined . This is happening as a json is expected and an undefined is obtained.

  2. Uncaught SyntaxError: Unexpected token u in JSON at position 0

    To Solve Uncaught SyntaxError: Unexpected token u in JSON at position 0 Error the “u” there is the first letter of undefined . This is happening as a json is expected and an undefined is obtained.

Solution 1

the “u” there is the first letter of undefined . This is happening as a json is expected and an undefined is obtained.

Solution 2

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.

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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