Function isValidDate

Check whether an unknown value represents a valid date.

Valid inputs include Date instances, finite millisecond timestamps, structured local date strings, and ISO 8601 strings with Z or a numeric timezone offset. Structured strings are parsed into numeric components and validated strictly, so invalid calendar dates are not normalized.

Supported string forms are YYYY-MM-DD, YYYY-MM-DD HH:mm[:ss], YYYY-MM-DDTHH:mm[:ss], and the same T-separated date-time with Z or a +HH:mm/-HH:mm offset. Zoned strings may include 1-3 millisecond digits.

Usage:

import { isValidDate } from "mazey";

const ret1 = isValidDate(1577877720000);
const ret2 = isValidDate("2020-01-01 11:22");
const ret3 = isValidDate("2020-02-30");
const ret4 = isValidDate(new Date("invalid"));

console.log(ret1, ret2, ret3, ret4);
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Output:

true true false false
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