PartialDeep & error TS2589: Type instantiation is excessively deep and possibly infinite

[merrywhether]

There is a known issue in TypeScript involving eager evaluation of recursive types in certain situations. We ran into this in our tests using PartialDeep on an element that included elemRef: Element in its props when we upgraded to TS 4.4; there must be a new recursive type definition somewhere in lib.dom now. The issue includes a suggested solution.

This TS playground illustrates both the problem and suggested fix for PartialDeep directly as well as the simpler PartialRecursive type from the TS issue.