How to get rid of "Invariant Violation tried to get frame out of range index NaN"?

Question

typescript

Good day!
I still can’t figure out the reason for this message from the compiler:

Invariant Violation tried to get frame out of range index NaN

I implemented fetching and getting data from a CSV file that is inside the application, and when I launched the tsx component, the compiler received an error message.

What does this mean and what did I miss at the base of this question? The examples of the problematic code themselves are in the comments and thank you in advance!

Answer 1

FlatList data must be an array or a simple object, and you pass Map there. Perhaps this is the reason.
And by the way, let catList = new StoreListService('categories',null).eventStart(); will create an empty collection. It will be filled in the readRemoteFile callback, that is, asynchronously. If Stores is already drawn by the time it is filled, it will not be updated. This is so, a lyrical digression.
And of course, in the current implementation there will be only 2 entries in catList - id and cat of the last line.