ember-intl
This library provides Ember Handlebar helpers and a localization service. The service, and helpers, provide a way to format dates, numbers, strings messages, including pluralization.
Ember-Intl 2.0
please go here.
This README is targets the 2.0 API which differs from previous and the current stable versions. If you are looking for the <= 1.3.0 documentation,Overview
Ember Intl is part of FormatJS, the docs can be found on the website:
Requirements
- ember-cli >= 0.2.0
- ember >= 1.10.x <= 1.13.x
Installation
ember install ember-intl@2.0.0-beta.13
- If you are targeting a browser that doesn't support the native Intl API (such as Safari or PhantomJS), you need to load the shim. The Intl.JS polyfill is automatically included into the
/assets
folder at build time.
<script src="assets/intl/intl.min.js"></script>
<script src="assets/intl/locales/en-us.js"></script>
<script src="assets/intl/locales/fr-fr.js"></script>
<script src="assets/intl/locales/es-es.js"></script>
<!--
You can view the full list of CLDR locales which can be accessed from the `/assets/intl` folder
of your application. The CLDRs are automatically placed there at build time. Typically this folder
on your filesystem is ``<project>/dist/assets/intl`
Full list: https://github.com/yahoo/formatjs-extract-cldr-data/tree/master/data/main
-->
Translations
Translations are defined in /translations
, outside of app
in either JSON or YAML format. Example of /translations/en-us.yaml
:
# en-us
product:
info: '{product} will cost {price, number, USD} if ordered by {deadline, date, time}'
title: 'Hello world!'
html:
info: '<strong>{product}</strong> will cost <em>{price, number, USD}</em> if ordered by {deadline, date, time}'
Configure application-wide locale
Open, or create, app/routes/application.js
and in the beforeModel
hook set intl.locale
. Example:
// app/routes/application.js
export default Ember.Route.extend({
intl: Ember.inject.service(),
beforeModel() {
// define the app's runtime locale
// For example, here you would maybe do an API lookup to resolver
// which locale the user should be targeted and perhaps lazily
// load translations using XHR and calling intl's `addMessage`/`addMessages`
// method with the results of the XHR request
this.set('intl.locale', 'en-us');
}
});
- A default locale is required. This is used as the "source of truth" to determine if any translations are missing a translation at build time. It will offer warnings displaying with locale's are missing translations for a particular key. The default locale is configurable within
config/environment.js
.
// config/environment.js
return {
intl: {
defaultLocale: 'en-us' // default value
}
};
Examples
Format Number
Formats numbers using Intl.NumberFormat
, and returns the formatted string value.
Or programmatically convert a number within any Ember Object.
// example
export default Ember.Component.extend({
intl: Ember.inject.service(),
computedNumber: Ember.computed('cost', function() {
return this.get('intl').formatNumber(this.get('cost')/*, optional options hash */);
})
});
Format Number Options
List of supported format number options
Format Date
Formats dates using Intl.DateTimeFormat
, and returns the formatted string value.
Or programmatically convert a date within any Ember Object.
// example
export default Ember.Component.extend({
intl: Ember.inject.service(),
computedNow: Ember.computed(function() {
return this.get('intl').formatDate(new Date()/*, optional options hash */);
})
});
Format Date Options
List of supported format date options
Format Time
This is just like the {{format-date}}
helper, except it will reference any string-named format
from formats.time
.
Or programmatically convert a time within any Ember Object.
// example
export default Ember.Component.extend({
intl: Ember.inject.service(),
computedNow: Ember.computed(function() {
return this.get('intl').formatTime(new Date()/*, optional options hash */);
})
});
Format Time Options
List of supported format date options
Format Relative
Formats dates relative to "now" using IntlRelativeFormat
, and returns the formatted string value.
export default Ember.Component.extend({
timestamp: Ember.computed(function() {
var date = new Date();
date.setDate(date.getDate() - 3);
return date;
})
});
Or programmatically convert a relative time within any Ember Object.
// example
export default Ember.Component.extend({
intl: Ember.inject.service(),
yesterday: Ember.computed(function() {
var date = new Date();
return this.get('intl').formatRelative(date.setDate(date.getDate() - 1)/*, optional options hash */);
})
});
Format Relative Options
List of supported format date options
Format Message
Formats ICU Message strings with the given values supplied as the hash arguments.
You have {numPhotos, plural,
=0 {no photos.}
=1 {one photo.}
other {# photos.}}
Or programmatically convert a message within any Ember Object.
export default Ember.Component.extend({
intl: Ember.inject.service(),
yesterday: Ember.computed(function() {
var now = new Date();
return this.get('intl').formatMessage('Hello {name}', { name: 'Jason' });
})
});
Format HTML Message
This delegates to the {{format-message}}
helper, but will first HTML-escape all of the hash argument values. This allows the message
string to contain HTML and it will be considered safe since it's part of the template and not user-supplied data.
Intl-Get
Utility helper for returning the value, or eventual value, based on a translation key. Should only ever be used as a subexpression, never as a standalone helper.
Will return the message from the current locale, or locale explicitly passed as an argument, message object.
product:
info: '{product} will cost {price, number, EUR} if ordered by {deadline, date, time}'
Polyfill
Disabling
// config/environment.js
module.exports = function() {
return {
intl: {
disablePolyfill: true
}
};
};
Cherry pick CLDR modules
At build time, we copy roughly 700 files, totaling 18mb, to the asset folder. Don't worry, this does not add weight to your app or vendor files. The only penalty you incur is at build time with the ember-cli build pipeline. Since most applications have a list of locales they target, you can specify the locales in config/environment.js
to optimize only copying the files needed.
module.exports = function() {
return {
intl: {
locales: ['en-us', 'fr-fr']
}
};
};
In this case, en-us.js
and fr-fr.js
will be copied to /assets/intl/locales
on build.
Change output path
// Brocfile.js
var app = new EmberApp({
outputPaths: {
intl: '/assets/intl' // default
}
});
Known Gotchas
date value is not finite in DateTimeFormat.format()
Browser vendors implement date/time parsing differently. For example, the following will parse correctly in Chrome but fail in Firefox: new Intl.DateTimeFormat().format('2015-04-21 20:47:31 GMT');
The solution is the ensure that the value you are passing in is in a format which is valid for the Date
constructor. This library currently does not try and normalize date strings outside of what the browser already implements.
Helper Options
- All helpers accept optional arguments:
locale
argument to explicitly pass/override the application localeformat
argument which you pass in a key corresponding to a format configuration inapp/formats.js
Writing Unit Tests
Phantom does support the Intl API, so in order for for you ember-intl to work in a browser which does not support the Intl API, it needs to be polyfilled.
To resolve this, add the following above all script tags in tests/index.html
:
<script src="assets/intl/intl.complete.js"></script>
Testing with ember-intl
Running
ember server
- Visit your app at http://localhost:4200.
Running Tests
ember test
ember test --server