jstimezonedetect

What is jstimezonedetect?

The jstimezonedetect npm package is a simple utility for detecting the time zone of a user's browser. It provides a straightforward way to get the time zone information, which can be useful for applications that need to display time-sensitive data correctly according to the user's local time zone.

What are jstimezonedetect's main functionalities?

Detecting the user's time zone

This feature allows you to detect the user's time zone. The code sample demonstrates how to use the jstimezonedetect package to determine the time zone and log it to the console.

const jstz = require('jstimezonedetect');
const timezone = jstz.determine().name();
console.log('Your time zone is:', timezone);

Other packages similar to jstimezonedetect

moment-timezone

Moment-timezone is an extension for Moment.js that adds support for time zones. It allows you to parse, manipulate, and display dates and times in different time zones. Compared to jstimezonedetect, moment-timezone offers more comprehensive date and time manipulation capabilities, but it is also larger in size.

luxon

Luxon is a modern JavaScript library for working with dates and times. It provides a comprehensive set of features for date and time manipulation, including time zone support. Luxon is a good alternative to jstimezonedetect if you need more advanced date and time handling capabilities.

date-fns-tz

date-fns-tz is a time zone extension for the date-fns library. It provides functions for working with time zones, such as converting dates between time zones and formatting dates in specific time zones. date-fns-tz is a lightweight alternative to jstimezonedetect, especially if you are already using date-fns in your project.

README

Introduction

This script gives you the zone info key representing your device's time zone setting.

The return value is an IANA zone info key (aka the Olson time zone database).

The IANA timezone database is pretty much standard for most platforms (UNIX and Mac support it natively, and every programming language in the world either has native support or well maintained libraries that support it).

Example Use

Invoke the script by calling

var tz = jstz.determine();
tz.name();
'Europe/Berlin'

Use Case

The script is useful if you do not want to disturb your users with questions about what time zone they are in. You can rely on this script to give you a key that is usable for server side date and time normalizations across time zones.

Limitations

This script does not do geo-location, nor does it care very much about historical time zones. So if you are unhappy with the time zone "Europe/Berlin" when the user is in fact in "Europe/Stockholm" - this script is not for you. They are both identical in modern time.

Also, if it is important to you to know that in Europe/Simferopool (Ukraine) the UTC offset before 1924 was +2.67, sorry, this script will not help you.

Time zones are a screwed up thing, generally speaking, and the scope of this script is to solve problems concerning modern time zones, in this case from 2010 and onwards.

Web Implementation

Simply include the dist/jstz.min.js file on your webpage at which point the jstz object will be exposed to you. You can always find the latest version at https://cdnjs.com/libraries/jstimezonedetect

NPM package

The latest version is always available as jstimezonedetect in NPM.

> var jstz = require('jstimezonedetect');
> jstz.determine().name();
'America/Chicago'

Demo

There is an updated demo running on: http://pellepim.bitbucket.org/jstz/.

Contribute?

If you want to contribute to the project (perhaps fix a bug, or reflect a change in time zone rules), please simply issue a Pull Request. Please take note that jstz.main.js is the source code, while jstz.rules.js is a generated file, any changes therein will be overwritten. The build is found in the dist folder in full and minified versions.

$ npm install 

Credits

Thanks to

• Josh Fraser for the original idea
• Brian Donovan for making jstz CommonJS compliant
• Ilya Sedlovsky for help with namespacing
• Jordan Magnuson for adding to cdnjs, documentation tags, and for reporting important issues
• Matt Johnson for adding support for the Internationalization API

Other contributors: Gilmore Davidson