zod/nullish

Allow both null and undefined in addition to the base type

const app = mvfm(prelude, zod);
const prog = app({ value: "string" }, ($) => {
  return $.zod.string().nullish().parse($.input.value);
});
await fold(
  defaults(app),
  injectInput(prog, { value: "hello" })
);

const app = mvfm(prelude, zod);
const prog = app({ value: "string" }, ($) => {
  return $.zod.string().nullish().parse($.input.value);
});
await fold(
  defaults(app),
  injectInput(prog, { value: "hello" })
);

const app = mvfm(prelude, zod);
const prog = app({ value: "string" }, ($) => {
  return $.zod.string().nullish().parse($.input.value);
});
await fold(
  defaults(app),
  injectInput(prog, { value: "hello" })
);

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