SyntaxError: JSON.parse: bad parsing
====================================

 The JavaScript exceptions thrown by `JSON.parse()` occur when string failed
 to be parsed as JSON.

Message
-------
```

SyntaxError: JSON.parse: unterminated string literal
SyntaxError: JSON.parse: bad control character in string literal
SyntaxError: JSON.parse: bad character in string literal
SyntaxError: JSON.parse: bad Unicode escape
SyntaxError: JSON.parse: bad escape character
SyntaxError: JSON.parse: unterminated string
SyntaxError: JSON.parse: no number after minus sign
SyntaxError: JSON.parse: unexpected non-digit
SyntaxError: JSON.parse: missing digits after decimal point
SyntaxError: JSON.parse: unterminated fractional number
SyntaxError: JSON.parse: missing digits after exponent indicator
SyntaxError: JSON.parse: missing digits after exponent sign
SyntaxError: JSON.parse: exponent part is missing a number
SyntaxError: JSON.parse: unexpected end of data
SyntaxError: JSON.parse: unexpected keyword
SyntaxError: JSON.parse: unexpected character
SyntaxError: JSON.parse: end of data while reading object contents
SyntaxError: JSON.parse: expected property name or '}'
SyntaxError: JSON.parse: end of data when ',' or ']' was expected
SyntaxError: JSON.parse: expected ',' or ']' after array element
SyntaxError: JSON.parse: end of data when property name was expected
SyntaxError: JSON.parse: expected double-quoted property name
SyntaxError: JSON.parse: end of data after property name when ':' was expected
SyntaxError: JSON.parse: expected ':' after property name in object
SyntaxError: JSON.parse: end of data after property value in object
SyntaxError: JSON.parse: expected ',' or '}' after property value in object
SyntaxError: JSON.parse: expected ',' or '}' after property-value pair in object literal
SyntaxError: JSON.parse: property names must be double-quoted strings
SyntaxError: JSON.parse: expected property name or '}'
SyntaxError: JSON.parse: unexpected character
SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data
```

Error type
----------

`SyntaxError`What went wrong?
----------------

`JSON.parse()` parses a string as JSON. This string has to be valid JSON
 and will throw this error if incorrect syntax was encountered.

Examples
--------

### JSON.parse() does not allow trailing commas

Both lines will throw a SyntaxError:


```js
JSON.parse("[1, 2, 3, 4,]");
JSON.parse('{"foo": 1,}');
// SyntaxError JSON.parse: unexpected character
// at line 1 column 14 of the JSON data
```


Omit the trailing commas to parse the JSON correctly:


```js
JSON.parse("[1, 2, 3, 4]");
JSON.parse('{"foo": 1}');
```

### Property names must be double-quoted strings

You cannot use single-quotes around properties, like 'foo'.


```js
JSON.parse("{'foo': 1}");
// SyntaxError: JSON.parse: expected property name or '}'
// at line 1 column 2 of the JSON data
```


Instead write "foo":


```js
JSON.parse('{"foo": 1}');
```

### Leading zeros and decimal points

 You cannot use leading zeros, like 01, and decimal points must be followed by at least
 one digit.


```js
JSON.parse('{"foo": 01}');
// SyntaxError: JSON.parse: expected ',' or '}' after property value
// in object at line 1 column 2 of the JSON data

JSON.parse('{"foo": 1.}');
// SyntaxError: JSON.parse: unterminated fractional number
// at line 1 column 2 of the JSON data
```


Instead write just 1 without a zero and use at least one digit after a decimal point:


```js
JSON.parse('{"foo": 1}');
JSON.parse('{"foo": 1.0}');
```

See also
--------

* `JSON`
* `JSON.parse()`
* `JSON.stringify()`