@formatjs/intl-datetimeformat/src/packer.js

Intl.DateTimeFormat polyfill

import "./types.js";
import "@formatjs/ecma402-abstract";
export function pack(data) {
	const zoneNames = Object.keys(data.zones);
	zoneNames.sort();
	return {
		zones: zoneNames.map((zone) => [zone, ...data.zones[zone].map(([ts, ...others]) => [ts === "" ? "" : ts.toString(36), ...others].join(","))].join("|")),
		abbrvs: data.abbrvs.join("|"),
		offsets: data.offsets.map((o) => o.toString(36)).join("|")
	};
}
export function unpack(data) {
	const abbrvs = data.abbrvs.split("|");
	const offsets = data.offsets.split("|").map((n) => parseInt(n, 36));
	const packedZones = data.zones;
	const zones = {};
	for (const d of packedZones) {
		const [zone, ...zoneData] = d.split("|");
		zones[zone] = zoneData.map((z) => z.split(",")).map(([ts, abbrvIndex, offsetIndex, dst]) => [
			ts === "" ? -Infinity : parseInt(ts, 36),
			abbrvs[+abbrvIndex],
			offsets[+offsetIndex],
			dst === "1"
		]);
	}
	return zones;
}