Incorrect definition for Date.UTC

[tungs]

es5.d.ts Update Request

Incorrect Definition

According to spec, the static method Date.UTC's second argument (monthIndex) should be optional, but in es5.d.ts, it isn't:

TypeScript/src/lib/es5.d.ts

Line 929 in d5d9171

UTC(year: number, monthIndex: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;

Sample Code

Date.UTC(2023); // should be valid

Documentation Links

MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/UTC#syntax
ECMAScript Spec: https://tc39.es/ecma262/multipage/numbers-and-dates.html#sec-date.utc

[Josh-Cena]

Note that this is es5.d.ts, so it cannot encode ES2017+ semantics. However, I'm not sure if declaration merging allows overriding the optionality of parameters.

[fatcerberus]

Declaration merging creates overloads IIRC, so that should be allowed.