effect-io-ai

Package: effect
Module: Predicate

Predicate.isError

A refinement that checks if a value is an instance of Error.

Example

import * as assert from "node:assert"
import { isError } from "effect/Predicate"

assert.strictEqual(isError(new Error("boom")), true)
assert.strictEqual(isError(new TypeError("boom")), true)

assert.strictEqual(isError({ message: "boom" }), false)
assert.strictEqual(isError("boom"), false)

Signature

declare const isError: (input: unknown) => input is Error

Source

Since v2.0.0