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@brightspace-ui/localize-behavior

v2.10.1

Published

Polymer mixin for localization of D2L components

Downloads

4,186

Readme

Building Lit components? Use BrightspaceUI/core instead.

@brightspace-ui/localize-behavior

Polymer mixin for localization of text, dates, times, numbers and file sizes. Also supports automatic language resolution, timezone and locale overrides.

Installation

Install from NPM:

npm install @brightspace-ui/localize-behavior

Usage

import '@brightspace-ui/localize-behavior/d2l-localize-behavior.js';
import { mixinBehaviors } from '@polymer/polymer/lib/legacy/class.js';

class MyElement extends mixinBehaviors([
  D2L.PolymerBehaviors.LocalizeBehavior
], PolymerElement) {

  static get template() {
    return html`<p>[[localize('hello')]]</p>`;
  }

  localizeConfig: {
    importFunc: async lang => (await import(`./lang/${lang}.js`)).default
  }
}

Language Resources

Store localization resources in their own directory with nothing else in it. There should be one JavaScript file for each supported locale.

// lang/en.js
export default {
  hello: `Hello, {firstName}!`
};
// lang/fr.js
export default {
  hello: `Bonjour, {firstName}!`
};
  • Always provide files for base languages (e.g. "en", "fr", "pt") so that if the user is using an unsupported regional language (e.g. "en-au", "fr-ca", "pt-br") it can fall back to the base language.
  • If there's no entry for a particular language, and no base language, the value of data-lang-default on the <html> element will be used.
  • If no data-lang-default is specified, "en" will be used as a last resort.

localize()

The localize() method is used to localize a piece of text in the component's template.

If the localized string contains arguments, pass them as additional parameters to localize:

static get template() {
  return html`<p>[[localize('hello', 'firstName', 'Mary')]]</p>`;
}

Numbers, File Sizes, Dates and Times

While localize-behavior does support formatting and parsing numbers, dates and times, instead please use the https://github.com/BrightspaceUI/intl/ library directly.

Developing

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

Running the demos

To start a @web/dev-server that hosts the demo page and tests:

npm start

Linting

npm run lint

Testing

# lint & run headless unit tests
npm test

# unit tests only
npm run test:headless

# debug or run a subset of local unit tests
npm run test:headless:watch

Versioning and Releasing

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.