Something like valueOr but for null? about optics-ts HOT 3 OPEN

Yeah, unfortunately there's no support for null yet. At some point I was pondering whether null should be treated the same way as undefined, so that e.g. optional() and valueOr() would consider null a missing value.

from optics-ts.

What's a good way of working around this? Something with .lens()?

from optics-ts.

For instance, @mnn, I think you could do this:

  const xO = O.optic<ZNull>()
    .prop('a')
    .lens(
      a => a ?? defaultA,
      (a, update) => update,
    )
    .prop('b')
    .lens(
      b => b ?? defaultB,
      (b, update) => update,
    )
    .prop('x');

from optics-ts.