[](https://www.npmjs.com/package/@polymer/app-localize-behavior) [](https://travis-ci.org/PolymerElements/app-localize-behavior) [](https://webcomponents.org/element/@polymer/app-localize-behavior) ## <app-localize-behavior> `app-localize-behavior` is a behavior that wraps the [format.js](http://formatjs.io/) library to help you internationalize your application. Note that if you're on a browser that does not natively support the [Intl](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl) object, you must load the polyfill yourself. An example polyfill can be found [here](https://github.com/andyearnshaw/Intl.js/). See: [Documentation](https://www.webcomponents.org/element/@polymer/app-localize-behavior), [Demo](https://www.webcomponents.org/element/@polymer/app-localize-behavior/demo/demo/index.html). ## Usage ### Installation ``` npm install --save @polymer/app-localize-behavior ``` ### In an html file using the localized element ```html ``` ### Localizing a Polymer 3 element ```js import {PolymerElement, html} from '@polymer/polymer'; import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js'; import {AppLocalizeBehavior} from '@polymer/app-localize-behavior/app-localize-behavior.js'; class SampleElement extends mixinBehaviors([AppLocalizeBehavior], PolymerElement) { static get template() { return html` `; } static get properties() { return { language: { value: 'en' }, } } function attached() { this.loadResources(this.resolveUrl('locales.json')); } } customElements.define('sample-element', SampleElement); ``` ## Contributing If you want to send a PR to this element, here are the instructions for running the tests and demo locally: ### Installation ```sh git clone https://github.com/PolymerElements/app-localize-behavior cd app-localize-behavior npm install npm install -g polymer-cli ``` ### Running the demo locally ```sh polymer serve --npm open http://127.0.0.1:/demo/ ``` ### Running the tests ```sh polymer test --npm ```