main.ts

import { Aurelia } from "aurelia-framework";
import { TCustomAttribute } from "aurelia-i18n";
import "bootstrap";
import Backend from "i18next-xhr-backend";
import moment from "moment";
import { parse } from "yamljs";
import environment from "./environment";

export function configure(aurelia: Aurelia) {
  aurelia.use
    .standardConfiguration()
    .feature('resources');

  aurelia.use.developmentLogging(environment.debug ? 'debug' : 'warn')
  .plugin("aurelia-i18n", i18n => {
    const aliases = ["t", "i18n"];
    TCustomAttribute.configureAliases(aliases);

    i18n.i18next.use(Backend);

    i18n.i18next.on("languageChanged", lng => {
      moment.locale(lng);
    });

    return i18n.setup({
      backend: {
        // loadPath: "./locales/{{lng}}/{{ns}}.json"
        loadPath: "./locales/{{lng}}/{{ns}}.yaml",
        parse
      },
      attributes: aliases,
      lng: "en",
      ns: ["translation"],
      defaultNS: "translation",
      fallbackLng: "fr",
      interpolation: {
        escapeValue: false
      },
      debug: false
    })     
  })
  .feature("resources");
    

  if (environment.testing) {
    aurelia.use.plugin('aurelia-testing');
  }

  return aurelia.start().then(() => aurelia.setRoot());
}