The `flattenTree` utility is mutative

[jossmac]

Not expecting a fix, just a heads up for folks who encounter the same issue.

You may see something like:

TypeError: Cannot create property 'id' on number '2'

🚨 Be wary of shallow cloning, objects are copied by reference:

flattenTree({ name: '', children: [...data] }) // `children` arrays (and other objects) are still mutated!

✅ Consider something like lodash.cloneDeep:

flattenTree({ name: '', children: cloneDeep(data) }) // original `data` remains intact

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue was closed automatically since it was marked as stale because it has not had recent activity. Thank you for your contributions.