@formatjs/ecma402-abstract/SupportedLocales.js

A collection of implementation for ECMAScript abstract operations

import { LookupSupportedLocales } from "@formatjs/intl-localematcher";
import { ToObject } from "./262.js";
import { GetOption } from "./GetOption.js";
/**
* https://tc39.es/ecma402/#sec-supportedlocales
* @param availableLocales
* @param requestedLocales
* @param options
*/
export function SupportedLocales(availableLocales, requestedLocales, options) {
	let matcher = "best fit";
	if (options !== undefined) {
		options = ToObject(options);
		matcher = GetOption(options, "localeMatcher", "string", ["lookup", "best fit"], "best fit");
	}
	if (matcher === "best fit") {
		return LookupSupportedLocales(Array.from(availableLocales), requestedLocales);
	}
	return LookupSupportedLocales(Array.from(availableLocales), requestedLocales);
}