The globalization (internationalization and localization) farm of the JavaScript community.
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README.md Further copyediting and consistency in README Jul 4, 2016
address-format.md General edit on several minor areas Nov 23, 2014
address-parse.md General edit on several minor areas Nov 23, 2014
calendar-manipulation.md General edit on several minor areas Nov 23, 2014
charset-mapping.md General edit on several minor areas Nov 23, 2014
code-point-support.md General edit on several minor areas Nov 23, 2014
collation.md General edit on several minor areas Nov 23, 2014
date-format.md General edit on several minor areas Nov 23, 2014
date-parse.md Updated for iLib, and added many new rows for various i18n features. Nov 21, 2014
date-range-format.md General edit on several minor areas Nov 23, 2014
glyph-support.md General edit on several minor areas Nov 23, 2014
locale-sensitive-capitalization.md General edit on several minor areas Nov 23, 2014
message-format.md General edit on several minor areas Nov 23, 2014
name-format.md General edit on several minor areas Nov 23, 2014
name-parse.md General edit on several minor areas Nov 23, 2014
number-format.md General edit on several minor areas Nov 23, 2014
number-parse.md General edit on several minor areas Nov 23, 2014
phone-number-format.md General edit on several minor areas Nov 23, 2014
phone-number-geolocation.md General edit on several minor areas Nov 23, 2014
phone-number-normalization.md General edit on several minor areas Nov 23, 2014
phone-number-parse.md General edit on several minor areas Nov 23, 2014
plural.md General edit on several minor areas Nov 23, 2014
relative-time-format.md General edit on several minor areas Nov 23, 2014
resource-bundle.md General edit on several minor areas Nov 23, 2014
time-zone-manipulation.md General edit on several minor areas Nov 23, 2014
unicode-character-properties.md General edit on several minor areas Nov 23, 2014
unicode-normalization-algorithm.md General edit on several minor areas Nov 23, 2014
unit-conversion.md General edit on several minor areas Nov 23, 2014
unit-format.md Duration format is a type of unit format for time Nov 21, 2014

README.md

JavaScript Globalization Overview

Overview page that shows what solutions exist for JavaScript globalization (internationalization and localization). What is missing. What overlaps. Why was each library created. What are their goals, strengths and weaknesses.

Summary

ECMA-402

The standard native implementation. It provides collation (string comparison), number formatting, and date and time formatting. The API was developed by a working group with members from Google, Microsoft, Mozilla (Norbert Lindenberg), Amazon, and IBM.

Strengths

  • Best performant on both speed and size. Speed, because it's native compiled code, which runs faster than interpreted JavaScript code from libraries. Size, because again it's native compiled code, which requires no extra JavaScript or resource loading (it relies on compiled i18n data) to be executed.

Weaknesses

  • Limited browser support (it may NOT be supported by your target client).
  • Lack of a resource loading mechanism (certain locale may NOT be available on your target client).
  • Inconsistency. Different browsers may give different results.

Links

Cldrpluralruleparser

Standalone library created by Santhosh Thottingal that provides CLDR plural rule parsing. Used by Wikimedia Foundation.

Strengths

  • Based on CLDR data (largest and most extensive i18n repository).
  • No bugs due to outdated i18n content (it has no hard coded i18n data).
  • Consistency. Same results are obtained across browsers.

Links:

FormatJS

FormatJS is a modular collection of JavaScript libraries for internationalization that are focused on formatting numbers, dates, and strings for displaying to people. It includes a set of core libraries that build on the JavaScript Intl built-ins and industry-wide i18n standards, plus a set of integrations for common template and component libraries.

Strengths:

Weaknesses:

  • No parsing beyond what the Date and Number built-ins provide.

Links:

Globalize

A jQuery project, initially created to fulfill jQuery UI (datepicker and spinner widgets). It provides number formatting and parsing, date and time formatting and parsing, message formatting, and plural support.

The design goals are (a) to leverage the official CLDR JSON data, (b) allow users to load as much or as little data as they need, (c) avoid duplicating data if using multiple i18n libraries that leverage CLDR, and (d) run in browsers or node.js.

Strengths

  • Based on CLDR data (the most extensive i18n repository).
  • No bugs due to outdated i18n content (it has no hard coded i18n data).
  • Consistency. Same results are obtained across browsers.
  • Allow different locale instances running simultaneously.

Links:

Google Closure i18n

Part of the larger Closure library, based on CLDR data. Provides number formatting and parsing, date and time formatting and parsing, message formatting (including plural and gender support), access to some of the CLDR data (like currency symbols).

Strengths

  • Based on CLDR data (the most extensive i18n repository).
  • Consistency. Same results are obtained across browsers.

Weaknesses

  • Supports only one locale at the time (default model, can be bypassed).

Links

ibm-js/ecma402

JavaScript implementation of some of the ECMA-402 APIs as developed by IBM. It provides number formatting and date and time formatting, but not collation. The package was primarily developed by John Emmons (IBM), who is the chairman of the Unicode CLDR Technical Committee. Members of IBM's Dojo development team assisted with many of the resource loading issues.

Strengths

  • Based on CLDR data (the most extensive i18n repository).
  • Consistency. Same results are obtained across browsers.
  • Provides a "shim" feature, which allows the native ECMA-402 implementation to be used when available.
  • Allows multiple locales to be available to the application.

Weaknesses

  • Official version not yet released - still under development.

Links

iLib

iLib is a library of JavaScript internationalization routines implemented in pure Javascript without many dependendencies on other libraries. It is the i18n library used in webOS, which is currently shipping on millions of LG SmartTVs.

Strengths:

  • Completeness. Goal is to be the "ICU" of Javascript!
  • Runs in rhino, nodejs, various browsers and webOS
  • Based on CLDR
  • Over 15,000 unit tests

Weaknesses:

  • Code is large. Needs to be modularized and to support more of a jquery-style plugins.
  • Needs some performance enhancements

Links:

jquery.i18n

jQuery based library port of MediaWiki's client side localization framework. Used by Wikimedia Foundation. Uses JSON based message file format (aka. "banana format"). Messages are in MediaWiki's own syntax. Supports Plural, Gender, Grammar, Number formatting. Also supports recursive nesting of plural, gender, grammar, etc.

Strenghts

Weaknesses

  • jQuery based library.

Links:

Messageformat.js

Standalone library created by Alex Sexton that provides ICU MessageFormat support, with built-in SelectFormat and pluggable PluralFormat.

Strengths

  • Precompile formatter for faster/smaller runtime.

Links:

Grid

  ECMA-402
Native
Cldrpluralruleparser
santhoshtr/cldrpluralruleparser
Globalize
jquery/globalize
Messageformat.js
slexaxton/messageformat.js
FormatJS
formatjs.io
iLib
ilib
jquery.i18n
wikimedia/jquery.i18n
Closure
https://developers.google.com/closure/
Functionality
 
Date Format
new Date() ⟹ Oct 23, 2014, 9:00:00 AM
✔️ ✔️ ✔️
Via ECMA-402 or its polyfil
✔️ ✔️
Date Parse
Oct 23, 2014, 9:00:00 AM ⟹ new Date()
✔️ ✔️
Relative Time Format
new Date() ⟹ last month
🔜 ✔️
Via intl-relativeformat
✔️ ✔️
goog.date.relative.
No localized data, loading translation with goog.getMsg
Date Range Format
Jan 11-13, 2015
✔️
Calendar Manipulation
Aban 1, 1393 (Persian)
✔️
Time Zone Manipulation
Jan 13, 1am New York time
✔️
 
Number Format
12734.89 ⟹ 12,734.89
✔️ ✔️ ✔️
Via ECMA-402 or its polyfil
✔️ ✔️
Number Parse
12,734.89 ⟹ 12734.89
✔️ ✔️ ✔️
 
Unit Format
1,234.56 feet, 98 minutes
✔️
Unit Conversion
1 mile ⟹ 16.09 km
✔️
 
Name Format
("John", "James", "Smith")
⟹ "John James Smith"
✔️
Name Parse
"John James Smith"
⟹ ("John", "James", "Smith")
✔️
 
Address Format
("Santa Clara", "CA", "USA", "94044")
⟹ Santa Clara, CA 94044
USA
✔️
Address Parse
Santa Clara, CA 94044
USA ⟹ ("Santa Clara", "CA", "USA", "94044")
✔️
 
Phone Number Format
("1", "650", "5551212")
⟹ 1 (650) 555-1212
✔️
20 locales
Phone Number Parse
1 (650) 555-1212
⟹ ("1", "650", "5551212")
✔️
20 locales
Phone Number Normalization
"5551212" ⟹ ("+", "1","650", "5551212")
✔️
Phone Number Geolocation
("0112345678", "France") ⟹ "Paris"
✔️
 
Charset Mapping
Shift-JIS ⟹ Unicode
🔜
 
Plural
3few
✔️ ✔️
Powered by santhoshtr/cldrpluralruleparser
✔️ ✔️ ✔️
Powered by santhoshtr/cldrpluralruleparser
✔️
Resource Bundle
getString(id) ⟹ "resource string"
✔️
Message Format
You have {count, plural,
one {1 item}
other {# items}} ⟹ You have 5 items
✔️
Powered by slexaxton/messageformat.js
✔️ ✔️
Via intl-messageformat
✔️ ✔️
Extensible mediawiki message format
✔️
Unicode Normalization Algorithm ✔️
Code Point Support ✔️
Glyph Support ✔️
Locale-sensitive Capitalization ✔️
Unicode Character Properties ✔️
(via the CType functions)
 
Template integration Handlebars
React
Dust
Closure Templates
https://developers.google.com/closure/templates/
 
Collation ✔️ ✔️
limited locales so far
Wrapper, calls the native ECMA-402 implementation if available, the old localeCompare if not.
 
I18n data Compiled CLDR >= 25 Compiled
Based on CLDR
Compiled or Dynamic load
Based on CLDR 22.1
CLDR >= 25 Compiled
Based on CLDR
 
Support
 
Environments Globals AMD
CommonJS
Globals
AMD
CommonJS
Globals
AMD
CommonJS
Globals
ES6
CommonJS
Globals
Globals
Node.js >= 0.12
en only by default
✔️ ✔️ ✔️ ✔️ ✔️ ✔️ ✔️
Browser Chrome: 24
Firefox: 29
Safari: N/A
Opera: 15
IE: 11
Reference MDN.
Chrome: (Current - 1) or Current
Firefox: (Current - 1) or Current
Safari: 5.1+
Opera: 12.1x, (Current - 1) or Current
IE: 8 (needs ES5 polyfill), IE9+
All ES3+ including IE6 Chrome: 20+
Firefox: 25
Safari: 5.1+
IE: 9+
Mobile iOS: 6.1+
Android: 2.3, 4.0+
✔️ ✔️ Android
iOS