Why are columns memoized?

[claresloggett]

Can anyone explain to me why the columns passed in to the MaterialReactTable columns property would be memoized? For instance, in this example sandbox https://codesandbox.io/p/devbox/material-react-table-example-advanced-93wiof the columns are set to useMemo<MRT_ColumnDef[]>() of the actual array of columns.

I ask because we've encountered a bug in the column hiding behaviour when setting columns & data dynamically and when enableRowSelection is enabled. Before putting in a bug report, I thought I'd try to create a reproducible sandbox, and noticed that in this existing sandbox, the columns are memoized - I'd like to make sure I am not doing something wrong before I submit a bug report.

If I remove the memoization in the sandbox, everything still seems to work, although maybe I'm missing something.

Thanks for any help!

[KevinVandy]

Just make sure your dependency array is correct and you won't have the bug probably.