This project is part of the @thi.ng/umbrella monorepo.
Custom error types and error factory functions.
Additional error types can be defined using
defError().
STABLE - used in production
yarn add @thi.ng/errors// ES module
<script type="module" src="https://unpkg.com/@thi.ng/errors?module" crossorigin></script>
// UMD
<script src="https://unpkg.com/@thi.ng/errors/lib/index.umd.js" crossorigin></script>Package sizes (gzipped, pre-treeshake): ESM: 262 bytes / CJS: 338 bytes / UMD: 403 bytes
import * as err from "@thi.ng/errors";
err.illegalArity(3)
// Error: illegal arity: 3
err.illegalArgs("expected foo");
// Error: illegal argument(s): expected foo
err.illegalState("oops");
// Error: illegal state: oops
err.unsupported("TODO not yet implemented")
// Error: unsupported operation: TODO not yet implemented
// define custom error
const MyError = err.defError(
() => "Eeek... ",
(x) => x + " is not allowed!"
);
try {
throw new MyError(23);
} catch(e) {
console.warn(e.message);
console.log(e instanceof Error);
}
// Eeek... 23 is not allowed!
// trueKarsten Schmidt
© 2018 - 2020 Karsten Schmidt // Apache Software License 2.0