Boolean

Simple boolean validation with optional default.

Chainable Methods

Method	Description	Example
.default(val)	Fallback boolean	.default(false)

Example

import { v, Infer } from 'typyn';

const isActiveSchema = v.boolean().default(false);

const isActive = isActiveSchema.parse(true); // true

const safe = isActiveSchema.safe('yes'); // { success: false, error: { path: '', message: 'Expected boolean' } }

type IsActive = Infer<typeof isActiveSchema>; // boolean

Error Example: Non-boolean throws "Expected boolean".

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Last updated: October 23, 2025.