function isValidDateimport { isValidDate } from "https://deno.land/x/isx@1.0.0-beta.19/mod.ts"; isValidDate(value: unknown): value is DateWhether the value is valid Date or not. Parametersvalue: unknown Any value. import { isValidDate } from "https://deno.land/x/isx@$VERSION/mod.ts" import { assertEquals } from "https://deno.land/std@$VERSION/testing/asserts.ts" assertEquals(isValidDate(new Date("2000/1/1")), true) assertEquals(isValidDate(new Date("invalid")), false) Returnsvalue is Date