"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.shouldPolyfill = void 0;
/**
 * Check if Intl.NumberFormat is ES2020 compatible.
 * Caveat: we are not checking `toLocaleString`.
 *
 * @public
 * @param unit unit to check
 */
function supportsES2020() {
    try {
        var s = new Intl.NumberFormat('en', {
            style: 'unit',
            // @ts-expect-error the built-in typing isn't supporting ES2020 yet.
            unit: 'bit',
            unitDisplay: 'long',
            notation: 'scientific',
        }).format(10000);
        // Check for a plurality bug in environment that uses the older versions of ICU:
        // https://unicode-org.atlassian.net/browse/ICU-13836
        if (s !== '1E4 bits') {
            return false;
        }
    }
    catch (e) {
        return false;
    }
    return true;
}
function shouldPolyfill() {
    return (typeof Intl === 'undefined' ||
        !('NumberFormat' in Intl) ||
        !supportsES2020());
}
exports.shouldPolyfill = shouldPolyfill;