effect-io-ai

Package: effect
Module: Boolean

Boolean.isBoolean

Checks whether a value is a boolean.

When to use

Use to validate unknown input and narrow it to boolean.

Example (Checking for booleans)

import { Boolean } from "effect"
import * as assert from "node:assert"

assert.deepStrictEqual(Boolean.isBoolean(true), true)
assert.deepStrictEqual(Boolean.isBoolean("true"), false)

Signature

declare const isBoolean: (input: unknown) => input is boolean

Source

Since v2.0.0