effect-io-ai

Package: effect
Module: Filter

Filter.date

A predefined filter that only passes through Date objects.

When to use

Use when you need to narrow unknown input to JavaScript Date instances with a reusable Filter.

Details

Implemented with fromPredicate(Predicate.isDate), so passing values return Result.succeed(input) and failing values return Result.fail(input).

Gotchas

The check uses instanceof Date, so invalid Date objects still pass; the filter does not validate the timestamp.

See

• Predicate.isDate for the underlying guard
• instanceOf for constructor-based filtering
• fromPredicate for custom date checks

Signature

declare const date: Filter<unknown, Date, unknown>

Source

Since v4.0.0