intl


Overview

This library consists of APIs to format and parse numbers, dates, times and file sizes for use in D2L Brightspace. It also provides localization for common terms.

> Looking for the older d2l-intl library? It's still here in the v2.x branch.

Why not just use the standard ECMAScript Internationalization API (ECMA-402) and related polyfills? Firstly, the standard doesn't include any parsing functionality. Additionally, Brightspace supports fine-grained locale customization at the organization and user levels -- configuration that simply isn't present in the native APIs.

Installation & Usage

Install from NPM:

``shell
npm install @brightspace-ui/intl
`

Then import only the functionality you need:

`javascript
import { formatDate, formatTime } from '@brightspace-ui/intl/lib/dateTime.js';
import { formatNumber, formatPercent } from '@brightspace-ui/intl/lib/number.js';
`

All of the APIs will automatically detect the document's language via the lang attribute on the element. They'll also look for various data- attributes that will be present in Brightspace pages to access override and timezone information.

Numbers

$3

Integer and decimal numbers can be formatted in the user's locale using formatNumber. Percentages can be formatted using formatPercent. Use the optional options parameter for rounding.

`javascript
import { formatNumber, formatPercent } from '@brightspace-ui/intl/lib/number.js';

const number = formatNumber(8902.72, [options]); // -> '8,902.72' in en-US
const percent = formatPercent(0.333, [options]); // -> '33.3 %' in en-US
`

Options:
- minimumFractionDigits: Minimum number of fraction digits to use. Possible values range from 0 to 20; the default is 0.
- maximumFractionDigits: Maximum number of fraction digits to use. Possible values range from 0 to 20; the default is the larger of minimumFractionDigits and 3.
- useGrouping: Whether to use grouping separators, such as thousands separators; the default is true.

Formatting as an integer (rounded to 0 decimal places):

`javascript
import { formatNumber } from '@brightspace-ui/intl/lib/number.js';

const value = formatNumber(89.72, {
maximumFractionDigits: 0
}); // -> '90' in en-US
`

Formatting as a percentage (rounded to 2 decimal places, but always showing at least 2 decimals):

`javascript
import { formatPercent } from '@brightspace-ui/intl/lib/number.js';

const value = formatPercent(0.333, {
minimumFractionDigits: 2,
maximumFractionDigits: 2
}); // -> '33.30 %' in en-US
`

$3

The parseNumber method can be used to parse an integer or decimal number written in the user's locale.

`javascript
import { parseNumber } from '@brightspace-ui/intl/lib/number.js';

const value = parseNumber('-8 942,39'); // -> -8942.39 in fr-CA
`

Dates & Times

$3

Dates and times can be formatted in the user's locale using formatDate, formatTime, formatDateTime, and formatRelativeDateTime.

Timestamps (milliseconds since the epoch) can be formatted in the user's locale and timezone using formatDateTimeFromTimestamp.

Combined dates and times are formatted using formatDateTime:

`javascript
import { formatDateTime } from '@brightspace-ui/intl/lib/dateTime.js';

const date = formatDateTime(
new Date(2015, 8, 23, 14, 5),
[options]
); // -> '2015-09-23 14:05' in sv-SE
`

Options:
- format: pattern to use when rendering the date-time; default is 'short'.
- full: long weekday, month names and timezone. e.g. 'Wednesday, September 23, 2015 1:25 PM EST'
- medium: short month names. e.g. 'Sept 23, 2015 1:25 PM'
- short: abbreviated date format. e.g. '9/23/2015 1:25 PM'

To format a timestamp as a date and time:

`javascript
const dateString = formatDateTimeFromTimestamp(
1607097863123,
[options]
);
`

Options are the same as for formatDateTime; this method converts the timestamp to a Date in the user's
configured time zone, then returns the results of passing this date to formatDateTime.

To format a timestamp as a date only:

`javascript
const dateString = formatDateFromTimestamp(
1607097863123,
[options]
);
`

Options are the same as for formatDate; this method converts the timestamp to a Date in the user's
configured time zone, then returns the results of passing this date to formatDate.

To format a timestamp as a time only:

`javascript
const timeString = formatTimeFromTimestamp(
1607097863123,
[options]
);
`

Options are the same as for formatTime; this method converts the timestamp to a Date in the user's
configured time zone, then returns the results of passing this date to formatTime.

To format a date only (without the time portion), use formatDate:

`javascript
import { formatDate } from '@brightspace-ui/intl/lib/dateTime.js';

const value = formatDate(
new Date(2015, 8, 23),
{format: 'full'}
); // -> 'miércoles 23 de septiembre de 2015' in es-MX
`

Options:
- format: pattern to use when rendering the date; default is 'short'.
- full: long weekday and month names. e.g. 'Wednesday, September 23, 2015'
- medium: long month names. e.g. 'September 23, 2015'
- short: abbreviated date format. e.g. '9/23/2015'
- monthYear: month and year only. e.g. 'September 2015'
- monthDay: month and day only. e.g. 'September 23'
- shortMonthDay: short month and day only. e.g. 'Sep 23'
- longDayOfWeek: long weekday only. e.g. 'Wednesday'
- shortDayOfWeek: short weekday only. e.g. 'Wed'
- longMonth: long month only. e.g. 'September'
- shortMonth: short month only. e.g. 'Sep'

To format a time only (without the date portion), use formatTime:

`javascript
import { formatTime } from '@brightspace-ui/intl/lib/dateTime.js';

const time = formatTime(
new Date(2015, 8, 23, 14, 5)
); // -> '오후 14:05' in ko-KR
`

Options:
- format: pattern to use when rendering the time; default is 'short'.
- full: includes timezone. e.g. '1:25 PM EST'
- medium or short: excludes timezone e.g. '1:25 PM'

To format a date/time in relative time, use formatRelativeDateTime:

`javascript
import { formatRelativeDateTime } from '@brightspace-ui/intl/lib/dateTime.js';

const relativeDateTime = formatRelativeDateTime(
new Date(2024, 8, 18)
); // If today is 2024-08-22, -> 'last week' in en-US
`

$3

To parse a date written in the user's locale, use parseDate:

`javascript
import { parseDate } from '@brightspace-ui/intl/lib/dateTime.js';

const date = parseDate('2015-09-23'); // in fr-CA
date.getFullYear(); // -> 2015
date.getMonth(); // -> 8 (months are 0-11)
date.getDate(); // -> 23
`

$3

To parse a time written in the user's locale, use parseTime:

`javascript
import { parseTime } from '@brightspace-ui/intl/lib/dateTime.js';

const date = parseTime('14 h 05'); // in fr-CA
date.getHours(); // -> 14
date.getMinutes(); // -> 5
`

$3

To convert an object containing a UTC date to an object containing a local date corresponding to the data-timezone attribute:
`javascript
import { convertUTCToLocalDateTime } from '@brightspace-ui/intl/lib/dateTime.js';

const UTCDateTime = {
month: 12,
date: 1,
year: 2015,
hours: 8,
minutes: 0,
seconds: 0
};
const localDateTime = convertUTCToLocalDateTime(
UTCDateTime
); // -> { month: 12, date: 1, year: 2015, hours: 3, minutes: 0, seconds: 0 } in America/Toronto
`

To convert an object containing a local date corresponding to the data-timezone attribute to an object containing a UTC date:
`javascript
import { convertLocalToUTCDateTime } from '@brightspace-ui/intl/lib/dateTime.js';

const localDateTime = {
month: 12,
date: 1,
year: 2015,
hours: 8,
minutes: 0,
seconds: 0
};
const UTCDateTime = convertLocalToUTCDateTime(
localDateTime
); // -> { month: 12, date: 1, year: 2015, hours: 13, minutes: 0, seconds: 0 } in America/Toronto
`

File Size Formatting

Use formatFileSize to format a file size appropriately for the user's locale.

`javascript
import { formatFileSize } from '@brightspace-ui/intl/lib/fileSize.js';

const fileSize = formatFileSize(100); // -> '100 bytes' in en-US
`

List Formatting

Use getSeparator to get the appropriate list separator for the current locale. This is a separator that would be used in spoken language; note that the separator includes a space, for locales where it is appropriate.

`javascript
import { getSeparator } from '@brightspace-ui/intl/lib/list.js';

const separator = getSeparator(); // -> ', ' in en-US
const separator = getSeparator({ nonBreaking: true }); // -> ',\xa0' in en-US
`

Options:
- nonBreaking: a Boolean flag, whether to use non-breaking spaces instead of standard spaces; default is false

Terminology

Use getTerminology to get terminology values defined by d2l.Languages.Terminology.* config variables.

`javascript
import { getTerminology, TerminologyKey } from '@brightspace-ui/intl/lib/terminology.js';

// Get the terminology value defined by the d2l.Languages.Terminology.Educator config variable
const educatorTerminology = getTerminology(TerminologyKey.Educator);
`

Language Localization

The Localize class allows text to be displayed in the user's preferred language.

$3

Each resource is comprised of a name and a message, which must be provided as a key-value pair in a JavaScript object:

`javascript
{ myMessage: "This is my message" }
`

#### Name

Names should succinctly and uniquely describe the text being localized. camelCase is recommended, although snake_case and kebab-case are also supported.

For large projects, resources may be grouped using the : character. For example: parentGroup:subGroup:messageName.

#### Message

Messages must conform to the ICU Message Syntax format. It supports features such as: simple arguments, the select format and pluralization.

> Note: Avoid using the ICU Message Syntax number, date and time formatting functionality. Brightspace allows customization of how these are localized, so use formatNumber, formatDate and formatTime instead.

$3

Import Localize and create a new instance. The importFunc option is required. It will be passed a language tag which can be used to fetch resources:

`javascript
import { Localize } from '@brightspace-ui/intl/lib/localize.js';

const localizer = new Localize({
importFunc: async lang => (await import(../lang/${lang}.js)).default
});
`

Wait for resources to be available before attempting to use them:
`javascript
await localizer.ready;
`

$3

The localize() method is used to localize a message.

If the message contains arguments, provide replacement values in the second parameter:

`javascript
const helloText = localizer.localize('hello', { firstName: 'Mary' });
`

$3

Rich formatting can be included in messages and safely converted to HTML with the localizeHTML() method.

#### Basic Formatting

The following formatting elements are supported out-of-the-box:

*

paragraphs


* line

breaks (note the end tag is required)
* bold
* strong
* italic
* emphasis

Remember that is for content of greater importance (browsers show this visually using bold), while only bolds the text visually without increasing its importance.

Similarly emphasizes a particular piece of text (browsers show this visually using italics), whereas only italicizes the text visually without emphasis.

Example:

`javascript
{
myMessage: "This is bold but not all that important."
}
`

#### Advanced Formatting

More advanced formatting can be achieved by providing replacement methods for custom tags, which are similar to arguments:

`javascript
{
goHome: "Go home"
}
`

Then, import localizeMarkup:
`javascript
import { localizeMarkup } from '@brightspace-ui/intl/lib/localize.js';
`

and provide a tag replacement method:
`javascript
localizer.localizeHTML('goHome', {
homeLink: chunks => localizeMarkup${chunks}
});
`
In addition to the Basic Formatting elements, these additional elements may also be used in replacement methods:

*
*

$3

Some localization resources are common and shared across D2L applications. To use these resources, set the loadCommon option:

`javascript
import { Localize } from '@brightspace-ui/intl/lib/localize.js';

const localizer = new Localize({
loadCommon: true
});
`

#### localizeCommon

The localized value of the following common terms can be accessed using localizeCommon(name):

Navigation
* navigation:back:title (Back)
* navigation:next:title (Next)
* navigation:previous:title (Previous)

#### localizeCharacter

The localized value of the following characters can be accessed using localizeCharacter(char):
* ' (apostrophe)
* & (ampersand)
(asterisk)
* \ (backslash)
* : (colon)
* , (comma)
* > (greater-than sign)
* < (less-than sign)
* # (number sign)
* % (percent sign)
* | (pipe)
* ? (question mark)
* " (quotation mark)

`javascript
const value = localizer.localizeCharacter('&'); // -> 'ampersand' in en-US
`

$3

Provide an onResourcesChange callback function to perform tasks when the document language is changed and updated resources are available:

`javascript
const localizer = new Localize({
onResourcesChange: () => document.title = localizer.localize('pageTitle')
});
`

To stop listening for changes, disconnect the instance:
`javascript
localizer.disconnect()
`

Developing and Contributing

After cloning the repo, run npm install to install dependencies.

$3

Start a @web/dev-server that hosts the test harness:

`shell
npm start
`

This will let you test the intl library in a browser, and will update live with any changes.

$3

Contributions are welcome, please submit a pull request!

$3

This repo is configured to use semantic-release. Commits prefixed with fix: and feat: will trigger patch and minor releases when merged to main`.

To learn how to create major releases and release from maintenance branches, refer to the semantic-release GitHub Action documentation.