The 3.x node.js driver shipped with the a .d.ts file. I understand this was not produced from TypeScript, and that the 4.x driver is now written in TypeScript.

However, the 4.x driver seems to have substantially reduced type safety. For example, whereas previously you could call .db<T>('collection name'), you now can only call .db('collection name'). Likewise, a query result's Cursor<T> has been replaced with non-generic FindCursor.

Is this by design, or, is this a bug in the typing? If the former, it is a major step down from the 3.x driver.