javascript - JSON.parse error is giving error with double quotes string - Stack Overflow

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Why is it that

//Code
JSON.parse("{'name':'Khushal Khan'}");

results in this error

//Resposnse
SyntaxError: Unexpected token '

while this works perfectly

//Code
JSON.parse('{"name":"Khushal Khan"}');

Output:

//Response
Object {name: "Khushal Khan"}

Why is it that

//Code
JSON.parse("{'name':'Khushal Khan'}");

results in this error

//Resposnse
SyntaxError: Unexpected token '

while this works perfectly

//Code
JSON.parse('{"name":"Khushal Khan"}');

Output:

//Response
Object {name: "Khushal Khan"}

• javascript
• json

Share Improve this question Follow asked Feb 28, 2014 at 17:02 user2009750user2009750 3,19766 gold badges3737 silver badges5858 bronze badges

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3 Answers 3

Sorted by: Reset to default 6

The problem is the type of quote used in your JSON string, not the outer quotes. The JSON specification only allows for double quoted strings. You could use either type of quote to actually pass your JSON string to the parse() function, though.

From the JSON spec:

The problem is not that your JavaScript string uses " characters but that your JSON strings do not.

JSON is not JavaScript. JSON strings must be delimited by " characters.

From the specification:

string = quotation-mark *char quotation-mark

and

quotation-mark = %x22      ; "

Problem is not with double quoted string, but the json should have no single quotes as delimiters.

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