Intl.PluralRules constructor should not be callable without new

[ptomato]

⚙ Compilation target

esnext

⚙ Library

lib.es2020.intl.d.ts

Missing / Incorrect Definition

TypeScript/src/lib/es2020.intl.d.ts

Line 452 in 637d574

(locales?: LocalesArgument, options?: PluralRulesOptions): PluralRules;

makes Intl.PluralRules callable without new, but this is not the case according to the Intl specification (step 1 of https://tc39.es/ecma402/#sec-intl.pluralrules).

Sample Code

Intl.PluralRules('en')
Intl.DurationFormat('en')
Intl.DateTimeFormat('en')


TSC produces an error on line 2, but it should also produce the same error on line 1. It should _not_ produce an error on line 3, since DateTimeFormat has the legacy behaviour of being callable without `new`.

Documentation Link

https://tc39.es/ecma402/#sec-intl.pluralrules