javascript - Trying to parse JSON string, unexpected number - Stack Overflow

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I am trying to parse this JSON:

var json = '{"material":"Gummislang 3\/4\" 30 m (utanp\u00e5liggande sk\u00e5p)"}'

I run JSON.parse(json) but i get the error SyntaxError: Unexpected number when doing so. I have tried this in Google Chrome. I don't know what the problem is since I can take the JSON string and put it in any JSON validator and it claims that the JSON is valid. Shouldn't the browser be able to parse it?

I am trying to parse this JSON:

var json = '{"material":"Gummislang 3\/4\" 30 m (utanp\u00e5liggande sk\u00e5p)"}'

I run JSON.parse(json) but i get the error SyntaxError: Unexpected number when doing so. I have tried this in Google Chrome. I don't know what the problem is since I can take the JSON string and put it in any JSON validator and it claims that the JSON is valid. Shouldn't the browser be able to parse it?

• javascript
• json

Share Improve this question Follow edited Apr 14, 2013 at 21:26 Dave 46.3k1212 gold badges7070 silver badges108108 bronze badges asked Apr 14, 2013 at 21:18 Anton GildebrandAnton Gildebrand 3,7071313 gold badges5252 silver badges9292 bronze badges 1

• Don't use string literals containing JSON! Use object literals instead. – Bergi Commented Apr 14, 2013 at 21:28

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2 Answers 2

Sorted by: Reset to default 6

You are inserting a JSON object representation into a JavaScript string without properly escaping the representation.

To avoid having to do this, remove the quotes you are adding around the representation, and skip the JSON.parse(json) – the default output from PHP's json_encode() is valid JavaScript when used in this context.

For security, you should specify the JSON_HEX_TAG option if possible. This will prevent cross-site scripting in cases where the JSON might end up inside a document parsed as XML. (And for XML documents, the JSON should be inside a CDATA section as well.)

You're validating the string literal, which is a valid JSON string containing invalid JSON. You need to validate the value of the string, which is not valid JSON.

If you paste the string value into a JSON validator, you'll see that the error es from this part:

"material": "Gummislang 3/4"30m

The " needs to be escaped.

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