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import { formatOffset, parseZoneInfo } from "../impl/util.js";
import Zone from "../zone.js";
let singleton = null;
/**
* Represents the local zone for this JavaScript environment.
* @implements {Zone}
*/
export default class SystemZone extends Zone {
/**
* Get a singleton instance of the local zone
* @return {SystemZone}
*/
static get instance() {
if (singleton === null) {
singleton = new SystemZone();
}
return singleton;
}
/** @override **/
get type() {
return "system";
}
/** @override **/
get name() {
return new Intl.DateTimeFormat().resolvedOptions().timeZone;
}
/** @override **/
get isUniversal() {
return false;
}
/** @override **/
offsetName(ts, { format, locale }) {
return parseZoneInfo(ts, format, locale);
}
/** @override **/
formatOffset(ts, format) {
return formatOffset(this.offset(ts), format);
}
/** @override **/
offset(ts) {
return -new Date(ts).getTimezoneOffset();
}
/** @override **/
equals(otherZone) {
return otherZone.type === "system";
}
/** @override **/
get isValid() {
return true;
}
}
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