Resolve JSON is Undefined Error in Internet Explorer

While running JSON code like the one shown below, older browsers like IE7 produces the error - ‘JSON’ is undefined:

JSON code

JSON is undefined

The error occurs while executing the JSON.parse() method by older browsers that have not implemented the JSON object. The solution to this error is to download the json2 library and include it in your script, as shown below:

Json2.js script

The application uses the json2.js library for browsers that haven’t implemented the JSON object yet. After adding the json2.js library, you can now test the application on IE7 and you will get the desired output

image

Note: All the latest browsers like Firefox 3.5+, IE 8+, Chrome, Safari 4+ etc. have built-in JSON capability.

You also want to look at Is my JSON valid?

15 comments:

  1. AnonymousJanuary 17, 2011 at 7:53 AM

    I get this error on IE8 also.

    ReplyDelete
  2. Suprotim AgarwalJanuary 17, 2011 at 9:00 PM

    That could be as you are running IE8 in compatibility mode?

    ReplyDelete
  3. AnonymousJanuary 18, 2011 at 7:54 PM

    Thanks a lot man. It really helped me out. Many thanks from Argentina =) Have a good day! bye.

    ReplyDelete
  4. AnonymousMarch 17, 2011 at 10:19 AM

    Perfect one..
    Thanks a lot..

    ReplyDelete
  5. wildkazJuly 19, 2011 at 7:23 AM

    Awesome man. You saved my life. Thanks (*follow*)

    ReplyDelete
  6. SrinivasanSeptember 22, 2011 at 1:34 AM

    Its really cooll man.

    ReplyDelete
  7. balaramDecember 11, 2011 at 9:22 PM

    thanks it works for me perfectly

    ReplyDelete
  8. mjwoudaFebruary 16, 2012 at 6:01 AM

    Excellent! Finally I get the Google Maps API in IE7 working! Thanks for sharing.

    ReplyDelete
  9. AnonymousMay 9, 2012 at 10:30 AM

    Oh man. Thanks for this help. You saved my week

    ReplyDelete
  10. AnonymousJune 19, 2012 at 4:19 AM

    Thank you! You solved my problem!

    ReplyDelete
  11. AnonymousAugust 20, 2013 at 4:29 AM

    Thanks alot man...it saved my life.

    ReplyDelete
  12. AnonymousSeptember 29, 2013 at 11:50 PM

    I included json2.js file but json invalid error is given in IE8

    ReplyDelete
  13. AnonymousSeptember 29, 2013 at 11:51 PM

    Pls give me solution

    ReplyDelete
  14. UnknownOctober 23, 2013 at 10:39 PM

    Thank you very much.
    From INDIA. :)

    ReplyDelete
  15. RamanaAugust 16, 2016 at 4:11 AM

    Thank you ! My application is in IE7 compatabality mode.When iam running locally iam not getting any Error.But in production iam getting.Any reason for this?

    ReplyDelete