terra-i18n/src/i18nLoader.js

The terra-i18n package provides on-demand internationalization of React components.

/* eslint-disable global-require, import/no-named-as-default */
import loadIntl from './intlLoaders';
import loadTranslations from './translationsLoaders';

const permitParams = (callback) => {
  if (typeof (callback) !== 'function') {
    throw new Error('Second argument must be function');
  }
};

export default (locale, callback, scope) => {
  permitParams(callback);

  /**
   * Use try-catch to check if Intl is provided by the browser. In some instances checking Intl will throw an
   * error and crash the page with little information.
   *
   * Reference: https://github.com/cerner/terra-core/issues/2820
   */
  let hasIntl;
  try {
    // eslint-disable-next-line compat/compat
    hasIntl = typeof (Intl) === 'object' && typeof (Intl.DateTimeFormat) === 'function' && typeof (Intl.NumberFormat) === 'function';
  } catch (error) {
    hasIntl = false;
  }

  if (!hasIntl) {
    require('intl');
  }

  if (global.IntlPolyfill) {
    /**
     * Intl polyfill attempts to cache and restore static RegExp properties before executing any regular expressions in order
     * to comply with ECMA-402. There are times this results in regex syntax error so we are disabling this feature.
     *
     * Reference: https://github.com/andyearnshaw/Intl.js#regexp-cache--restore
     */
    /* eslint-disable no-underscore-dangle */
    if (Intl.__disableRegExpRestore && typeof Intl.__disableRegExpRestore === 'function') {
      Intl.__disableRegExpRestore();
    }
    /* eslint-enable no-underscore-dangle */

    loadIntl(locale);
  }

  loadTranslations(locale, callback, scope);
};
/* eslint-enable global-require, import/no-named-as-default */