intl-messageformat

What is intl-messageformat?

The intl-messageformat package is a library for internationalization that allows formatting of messages including variable replacement, number and date formatting, and pluralization. It is built on the Internationalization API provided by modern browsers and can be used in both browser and Node.js environments.

What are intl-messageformat's main functionalities?

Variable Replacement

This feature allows you to insert variables into your message strings.

const IntlMessageFormat = require('intl-messageformat').default;
const message = new IntlMessageFormat('My name is {name}.');
const output = message.format({ name: 'Alice' });
console.log(output); // 'My name is Alice.'

Number Formatting

This feature allows you to format numbers according to the locale, including decimal and thousand separators.

const IntlMessageFormat = require('intl-messageformat').default;
const message = new IntlMessageFormat('The price is {price, number}.', 'en-US');
const output = message.format({ price: 123456.78 });
console.log(output); // 'The price is 123,456.78.'

Date Formatting

This feature allows you to format dates according to the locale.

const IntlMessageFormat = require('intl-messageformat').default;
const message = new IntlMessageFormat('Today is {today, date, long}.', 'en-US');
const output = message.format({ today: new Date() });
console.log(output); // 'Today is January 1, 2020.'

Pluralization

This feature allows you to handle plural forms of words based on numeric values.

const IntlMessageFormat = require('intl-messageformat').default;
const message = new IntlMessageFormat('{numPhotos, plural, =0{no photos} =1{one photo} other{# photos}}', 'en-US');
const output = message.format({ numPhotos: 1000 });
console.log(output); // '1000 photos'

Other packages similar to intl-messageformat

formatjs

FormatJS is a set of JavaScript libraries that includes intl-messageformat and other internationalization capabilities like message extraction and locale data management. It provides a more comprehensive solution compared to intl-messageformat alone.

i18next

i18next is a full-featured internationalization framework for JavaScript. It offers a wide range of features including variable replacement, pluralization, and context handling. It is more feature-rich and has a larger ecosystem compared to intl-messageformat.

messageformat

Messageformat is a library for ICU MessageFormat strings that supports plural and select messages, nested formats, and more. It is similar to intl-messageformat but also includes a compiler that can optimize message functions.

README

Intl MessageFormat

We've migrated the docs to https://formatjs.io/docs/intl-messageformat.