isDate

Problem

You need to check whether a value is a Date instance — for example validating serialized form inputs before date math.

Solution

Use isDate(value) to narrow the type to Date.

import { isDate } from '@vielzeug/arsenal';

isDate(new Date()); // true
isDate('2024-01-01'); // false
isDate(1704067200000); // false

Related

• isDefined