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Asked: 2020-05-11 02:52:31 +0800 CST 2020-05-11 02:52:31 +0800 CST

JSON.parse: expected property name or '}' JavaScript

  • 772

I have this String:

[
    {'lat':43.4627,'lng':-3.79636,'description':'a'}, 
    {'lat':43.4476,'lng':-3.82948,'description':'b'}, 
    {'lat':43.4228,'lng':-3.82391,'description':'c'}
]

And when I try to validate it here it gives me this error:

SyntaxError: JSON.parse: expected property name or '}' at line 1 
column 2 of the JSON data

Can anyone tell me what's wrong with my String?

javascript

3 Answers

  1. Best Answer

    the mistake you mention

    JSON.parse: expected property name or '}'

    or you can also get :

    Expecting 'STRING', '}', got 'undefined'

    They are caused because it is necessary to use double quotes to define strings.

    This would work correctly:

    [{
        "lat": 43.4627,
        "lng": -3.79636,
        "description": "a"
    },
    {
        "lat": 43.4476,
        "lng": -3.82948,
        "description": "b"
    },
    {
        "lat": 43.4228,
        "lng": -3.82391,
        "description": "c"
    }
]

    I recommend you use a json validator in these cases.

    • 2

  2. Object field names must be enclosed in double quotes instead of single quotes.

    [
    {"lat":43.4627,"lng":-3.79636,"description":"a"}, 
    {"lat":43.4476,"lng":-3.82948,"description":"b"}, 
    {"lat":43.4228,"lng":-3.82391,"description":"c"}
]
    • 1

  3. Field names must be in double quotes instead of single quotes.

    [
    {"lat":43.4627,"lng":-3.79636,"description":"a"}, 
    {"lat":43.4476,"lng":-3.82948,"description":"b"}, 
    {"lat":43.4228,"lng":-3.82391,"description":"c"}
]

    json

    According to the official documentation :

    A value can be a string enclosed in double quotes , or a number, or true or false or null, or an object or an array.

    • 1