IE gives an error trying to parse JSON

Question

All, I'm trying to parse some JSON and IE is giving me an error but not surprisingly the other browsers are ok with it. Here is my code:

var result = JSON.parse(data.result); 
var uploadType = result[0].upload_type;
var filename = result[0].name;
var insert_id = result[0].insert_id;

I'm getting an error on the first line. Any idea how to make this IE proof?

Thanks!

Possible duplicate ['JSON' is undefined error in IE only](http://stackoverflow.com/questions/5093582/json-is-undefined-error-in-ie-only) — Andreas, Jul 11 '12 at 21:26

score 14 · Accepted Answer · 2013-04-19T00:17:29.210

14

Internet Explorer does not support JSON.parse before version 8. You may use jQuery.parseJSON instead (as I see you have tagged the question jquery).

edited Apr 19 '13 at 00:17

answered Jul 11 '12 at 21:26

Thanks, I am using jQuery. Can I just simply replace JSON.parse with jQuery.parseJSON? – user1048676 Jul 11 '12 at 21:32
In addition to that, will the jQuery.parseJSON work in my other browsers the same way? – user1048676 Jul 11 '12 at 21:40
1

When I updated it, I get the following error now: Message: '0' is null or not an object – user1048676 Jul 11 '12 at 21:52
@user1048676: Could you please provide a [jsFiddle](http://jsfiddle.net/) that reproduces the error? – Jul 11 '12 at 21:53
JSon is suppoerted in ie8 . – Royi Namir Apr 10 '13 at 06:40

score 1 · Answer 2 · answered Jul 11 '12 at 21:27

1

Internet Explorer doesnt support JSON.parse, reference the json2 script at and you will get the same functionality.

answered Jul 11 '12 at 21:27

Jason Quinn

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When I added the json2 script it gets past the first error but then it tells me that Message: '0' is null or not an object – user1048676 Jul 11 '12 at 21:40
Are you sure you are parsing a valid JSON string? – Jason Quinn Jul 11 '12 at 21:43
I'm pretty sure. I used this code because of this link: http://stackoverflow.com/questions/11406202/determine-response-from-php-in-jquery – user1048676 Jul 11 '12 at 21:46

score 0 · Answer 3 · answered Jul 11 '12 at 21:28

0

You haven't specified the IE version, but if you're using IE8 or earlier, it doesn't support the JSON object natively.

You'll need a third-party library to polyfill this feature.

jQuery is one option.

You can find a bunch of other options here: https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills

answered Jul 11 '12 at 21:28

Spudley

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You're correct, it's IE8. I'm also using jQuery. How can I make this snippet work with jQuery? – user1048676 Jul 11 '12 at 21:33
the context of your code snippet is unclear, but jquery provides transparent json encoding/decoding for its ajax calling routines. If you're receiving the `result` variable via an ajax call, jquery should be able to provide it already decoded. If the context is not ajax, then you can use [`$.parseJSON()`](http://api.jquery.com/jQuery.parseJSON/). Hope that helps. – Spudley Jul 12 '12 at 06:20

score 0 · Answer 4 · answered Jul 12 '12 at 19:35

0

I've tried this one and this worked for me: https://github.com/flowersinthesand/jquery-stringifyJSON

The previous solutions doesn't work for me, even this: https://github.com/douglascrockford/JSON-js

answered Jul 12 '12 at 19:35

danieltc07

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score 0 · Answer 5 · answered Apr 28 '19 at 21:24

0

For those who cannot use third libraries, you can always make use of

eval('var data = ' + request.responseText);

to get the same functionality

answered Apr 28 '19 at 21:24

lambidu

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Be careful about using eval function, because that can inject javascript. Use only if you have full control about the contents. Imagine the "request.responseText" contains some part of a field inserted by some user. The user can fill javascript code to be injected on the page! – Manuel Romeiro Dec 11 '19 at 14:08
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You're right, `eval()` isn't safe at all, but we speak here about IE... :D – lambidu Dec 12 '19 at 16:27

IE gives an error trying to parse JSON

5 Answers5