effect-io-ai

Package: effect
Module: Config

Config.orElse

Provides a fallback config when parsing fails with a ConfigError.

When to use

Use when you need to try an alternative config source after the primary one fails.

Details

Unlike withDefault, this catches all ConfigErrors (not just missing data). The fallback function receives the error and returns a new Config.

Example (Falling back to a literal)

import { Config } from "effect"

const hostConfig = Config.string("HOST").pipe(
  Config.orElse(() => Config.succeed("localhost"))
)

See

• withDefault – fallback only on missing data

Signature

declare const orElse: { <A2>(that: (error: ConfigError) => Config<A2>): <A>(self: Config<A>) => Config<A2 | A>; <A, A2>(self: Config<A>, that: (error: ConfigError) => Config<A2>): Config<A | A2>; }

Source

Since v2.0.0