This library consists of APIs to format and parse numbers, dates, times and file sizes for use in D2L Brightspace.
Looking for the older
d2l-intllibrary? It's still here in thev2.xbranch.
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.
Install from NPM:
npm install @brightspace-ui/intlThen import only the functionality you need:
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 <html> element. They'll also look for various data- attributes that will be present in Brightspace pages to access override and timezone information.
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.
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-USOptions:
- minimumFractionDigits: Minimum number of fraction digits to use. Possible values range from
0to20; the default is0. - maximumFractionDigits: Maximum number of fraction digits to use. Possible values range from
0to20; the default is the larger ofminimumFractionDigitsand3. - useGrouping: Whether to use grouping separators, such as thousands separators; the default is
true.
Formatting as an integer (rounded to 0 decimal places):
import { formatNumber } from '@brightspace-ui/intl/lib/number.js';
const value = formatNumber(89.72, {
maximumFractionDigits: 0
}); // -> '90' in en-USFormatting as a percentage (rounded to 2 decimal places, but always showing at least 2 decimals):
import { formatPercent } from '@brightspace-ui/intl/lib/number.js';
const value = formatPercent(0.333, {
minimumFractionDigits: 2,
maximumFractionDigits: 2
}); // -> '33.30 %' in en-USThe parseNumber method can be used to parse an integer or decimal number written in the user's locale.
import { parseNumber } from '@brightspace-ui/intl/lib/number.js';
const value = parseNumber('-8 942,39'); // -> -8942.39 in fr-CADates 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:
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-SEOptions:
- 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'
- full: long weekday, month names and timezone. e.g.
To format a timestamp as a date and time:
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:
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:
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:
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-MXOptions:
- 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'
- full: long weekday and month names. e.g.
To format a time only (without the date portion), use formatTime:
import { formatTime } from '@brightspace-ui/intl/lib/dateTime.js';
const time = formatTime(
new Date(2015, 8, 23, 14, 5)
); // -> '오후 14:05' in ko-KROptions:
- 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'
- full: includes timezone. e.g.
To format a date/time in relative time, use formatRelativeDateTime:
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-USTo parse a date written in the user's locale, use parseDate:
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(); // -> 23To parse a time written in the user's locale, use parseTime:
import { parseTime } from '@brightspace-ui/intl/lib/dateTime.js';
const date = parseTime('14 h 05'); // in fr-CA
date.getHours(); // -> 14
date.getMinutes(); // -> 5To convert an object containing a UTC date to an object containing a local date corresponding to the data-timezone attribute:
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/TorontoTo convert an object containing a local date corresponding to the data-timezone attribute to an object containing a UTC date:
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/TorontoUse formatFileSize to format a file size appropriately for the user's locale.
import { formatFileSize } from '@brightspace-ui/intl/lib/fileSize.js';
const fileSize = formatFileSize(100); // -> '100 bytes' in en-USUse 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.
import { getSeparator } from '@brightspace-ui/intl/lib/list.js';
const separator = getSeparator(); // -> ', ' in en-US
const separator = getSeparator({ nonBreaking: true }); // -> ',\xa0' in en-USOptions:
- nonBreaking: a Boolean flag, whether to use non-breaking spaces instead of standard spaces; default is
false
The Localize class allows text to be displayed in the user's preferred language.
Each resource is comprised of a name and a message, which must be provided as a key-value pair in a JavaScript object:
{ myMessage: "This is my message" }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.
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,formatDateandformatTimeinstead.
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:
import { Localize } from '@brightspace-ui/intl/lib/localize.js';
const localizer = new Localize({
importFunc: async lang => (await import(`../lang/${lang}.js`)).default
});Wait for resources to be available before attempting to use them:
await localizer.ready;The localize() method is used to localize a message.
If the message contains arguments, provide replacement values in the second parameter:
const helloText = localizer.localize('hello', { firstName: 'Mary' });Rich formatting can be included in messages and safely converted to HTML with the localizeHTML() method.
The following formatting elements are supported out-of-the-box:
<p>paragraphs</p>line<br></br>breaks(note the end tag is required)<b>bold</b><strong>strong</strong><i>italic</i><em>emphasis</em>
Remember that <strong> is for content of greater importance (browsers show this visually using bold), while <b> only bolds the text visually without increasing its importance.
Similarly <em> emphasizes a particular piece of text (browsers show this visually using italics), whereas <i> only italicizes the text visually without emphasis.
Example:
{
myMessage: "This is <b>bold</b> but <em>not</em> all that <strong>important</strong>."
}More advanced formatting can be achieved by providing replacement methods for custom tags, which are similar to arguments:
{
goHome: "Go <homeLink>home</homeLink>"
}Then, import localizeMarkup:
import { localizeMarkup } from '@brightspace-ui/intl/lib/localize.js';and provide a tag replacement method:
localizer.localizeHTML('goHome', {
homeLink: chunks => localizeMarkup`<d2l-link href="/home">${chunks}</d2l-link>`
});In addition to the Basic Formatting elements, these additional elements may also be used in replacement methods:
<d2l-link><d2l-tooltip-help>
Provide an onResourcesChange callback function to perform tasks when the document language is changed and updated resources are available:
const localizer = new Localize({
onResourcesChange: () => document.title = localizer.localize('pageTitle')
});To stop listening for changes, disconnect the instance:
localizer.disconnect()After cloning the repo, run npm install to install dependencies.
Start a @web/dev-server that hosts the test harness:
npm startThis will let you test the intl library in a browser, and will update live with any changes.
Contributions are welcome, please submit a pull request!
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.