Retrieve the JSON formatting code after Switching to Design mode

Question

We are using SharePoint 2019, we have some JSON formatting code for a column,

After Switching from Advance Mode to Design mode, All the JSON format code disappeared!!

I don't know what is the issue or how to retrieve the JSON code back in the SharePoint Column format?
Is there any way to retrieve the lost JSON formatting code?

Answer 1

JSON Column Formatting in SharePoint

Unfortunately, you can't retrieve back the JSON column formatting code after switching from Advance Mode to Design mode!

I wrote this below important note at Date Conditional Formatting In SharePoint 2019

Note: Switching from Advance Mode to Design mode will discard the current JSON formatting code.

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