Home/ Questions/Steps to fix "uncaught syntaxerror: unexpected token o in json at position 1" error
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Rose Coste
  • 25
Asked: 2022-05-11T19:09:23+00:00 In:

Steps to fix “uncaught syntaxerror: unexpected token o in json at position 1” error

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I am trying to write a programs code that returns the invalid answer. I don’t know where the incorrect command is in the problem – uncaught syntaxerror: unexpected token o in json at position 1. My detail is:

{ 
  "data":{ 
  "userList":[ 
  { 
  "id":1,
  "name":"soni"
  }
  ]
  },
  "status":200,
  "config":{ 
  "method":"POST",
  "transformRequest":[ 
  null
  ],
  "transformResponse":[ 
  null
  ],
  "url":"/home/main/module/userlist",
  "headers":{ 
  "rt":"ajax",
  "Tenant":"Id:null",
  "Access-Handler":"Authorization:null",
  "Accept":"application/json, text/plain, */*"
  }
  },
  "statusText":"OK"
 }
var userData = _data;
 var newData = JSON.parse(userData).data.userList;

and I end up with the warning message:

uncaught syntaxerror: unexpected token o in json at position 1

Pls, suggest the best answer to fix it.

unexpected token o in json at position 1
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2 Answers

  1. Best Answer
    Expert

    The cause:  The reason is that JSON.parse() created a string from the input. While the method toString() of JavaScript objects obviously returns [object Object]. It is already a JavaScript object, and it does not have any JSON string in the code.

    Solution:  No need to bother about parsing.

    Maybe you just check in Chrome’s console:

    new Object().toString() 
// "[object Object]" 

JSON.parse(new Object()) 
// Uncaught SyntaxError: Unexpected token o in JSON at position 1 

JSON.parse("[object Object]") 
// Uncaught SyntaxError: Unexpected token o in JSON at position 1
    • 16

  2. Your data is a JavaScript object and the first parameter of JSON.parse is expected to be string. It will then coerce it into the string "[object Object]". Before passing data, you should use JSON.stringify: 

    JSON.parse(JSON.stringify(userData))
    • 17

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