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.

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

install

npm install runtypes-pretty-validation

options

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

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.