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I am using the following JS code to parse a JSON string from a separate JS file:

// extract JSON from a module's JS
var jsonMatch = data.match( /\/\*JSON\[\*\/([\s\S]*?)\/\*\]JSON\*\// );
data = JSON.parse( jsonMatch ? jsonMatch[1] : data );

This is an example of the JS file I extract the JSON string from:

JsonString = /*JSON[*/{"entities":[{"type":"EntityPlayer","x":88,"y":138}]}/*]JSON*/;

This code works just fine, however if the JS file with the JSON string contains carriage returns and isn't on one plete line then I get a syntax error.

Example:

JsonString = /*JSON[*/{
     "entities":[{
         "type":"EntityPlayer",
         "x":88,
         "y":138}]
     }/*]JSON*/;

Returns the following error:

JSON.parse: unexpected non-whitespace character after JSON data

Any idea how I could modify my parsing to work by either stripping out whitespace or to remove carriage returns and new line spaces?

I am using the following JS code to parse a JSON string from a separate JS file:

// extract JSON from a module's JS
var jsonMatch = data.match( /\/\*JSON\[\*\/([\s\S]*?)\/\*\]JSON\*\// );
data = JSON.parse( jsonMatch ? jsonMatch[1] : data );

This is an example of the JS file I extract the JSON string from:

JsonString = /*JSON[*/{"entities":[{"type":"EntityPlayer","x":88,"y":138}]}/*]JSON*/;

This code works just fine, however if the JS file with the JSON string contains carriage returns and isn't on one plete line then I get a syntax error.

Example:

JsonString = /*JSON[*/{
     "entities":[{
         "type":"EntityPlayer",
         "x":88,
         "y":138}]
     }/*]JSON*/;

Returns the following error:

JSON.parse: unexpected non-whitespace character after JSON data

Any idea how I could modify my parsing to work by either stripping out whitespace or to remove carriage returns and new line spaces?

• javascript
• jquery
• json
• parsing

Share Improve this question Follow asked Jun 14, 2012 at 6:40 gotnullgotnull 27.2k2222 gold badges143143 silver badges205205 bronze badges 3

• You could be overthinking it. How are you fetching this file? How do you get it's contents? – Joseph Commented Jun 14, 2012 at 6:46
• I am not seeing that problem: jsfiddle/UrQ7Y – Ray Toal Commented Jun 14, 2012 at 6:50
• I agree with above probably best to try and get rid of the carriage returns and white space rather than code around it. In php you could use some like json_encode to do this for you. – matpol Commented Jun 14, 2012 at 6:52

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2 Answers 2

Sorted by: Reset to default 6

data = JSON.parse( (jsonMatch ? jsonMatch[1] : data).replace(/\n/g,"") );

Did not test it, but maybe this is what you are looking for?

var JsonString = JsonString.replace(new RegExp( "\\n", "g" ),"");

(from http://www.bennadel./blog/161-Ask-Ben-Javascript-Replace-And-Multiple-Lines-Line-Breaks.htm)

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