runtypes-pretty-validation

validate runtypes schemas against a value, and reflect back a pretty validation report, matching the schema.
Prettyifies structural error messages arbitrarily deep.

``ts
import { validate } from "runtypes-pretty-validation";
const schema = rt.Record({ foo: rt.Literal("bar") });
validate(schema, null); // Expected object, got "null"
validate(schema, { bar: "bar" }); // { foo: 'Expected literal bar, but was undefined' }
validate(schema, { foo: "bar" }); // undefined, all valid
`

![main](https://github.com/cdaringe/runtypes-pretty-validation/actions/workflows/main.yml)

install

npm install runtypes-pretty-validation

options

Options may be specified. See ./index.ts for defaults.

`ts
validate(schema, value[, opts])
`

- useFirstUnionSchemaOnFail: boolean`: if a validation fails all union members, report the schema validation errors from the first schema in the union.

examples

see test.ts for more.