IE 11 does not support JSON

Our web application runs smoothly on Windows 7 with IE 11 for the majority of users, except for one individual who encounters an error.

One user is seeing the following error message:

"JSON" is undefined

This issue arises when the code executes the line:

JSON.parse(....)

The document includes the standard doctype header:

<!DOCTYPE html>

In addition, the website should not be rendering in IE's compatibility mode (based on the screenshots shared by the user).

We were able to replicate the problem only by enabling compatibility mode. It's worth noting that the application functions properly for over 20 other users.

Is there a way to verify if the application is running in compatibility mode? Or could there be another reason why JSON is undefined?

javascriptjsoninternet-explorer-11

Answer №1

To verify the compatibility mode, you have the option of using:

document.documentMode

This will allow you to check if the document is in compatibility mode or not.

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