Upgrading/Migrating to Flash Builder 4.6 and AIR 3 (JSON)

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Type 1120: Access of undefined property JSON

If you’re using as3corelib like I’ve been using for quite some time now, you will notice this error.  To fix it you simply need to remove the following import (it may vary based on your project structure):

import com.adobe.serialization.json.JSON;

 

and then you’ll need to modify your code to replace:

JSON.decode(myString);
and
JSON.encode(myObject);

to:

JSON.parse(myString);
and
JSON.stringify(myObject);

 

You can find the full details of the new implementation of the native JSON support in AS3 on Adobe’s Reference Site

 

9 thoughts on “Upgrading/Migrating to Flash Builder 4.6 and AIR 3 (JSON)”

  1. Charles

    Thanks so much! I searched for hours for a solution to the “Access of undefined property JSON” error I was getting, and 2 minutes after finding this blog post the project I’m trying to compile built and everything worked. I greatly appreciate you putting this information out there!

    Charles.

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