add registerLocale function that supported esbuild

npm/ng-packs/packages/core/locale/src/utils/register-locale.ts

@@ -15,6 +15,72 @@ export interface RegisterLocaleData {
   errorHandlerFn?: (data: LocaleErrorHandlerData) => any;
 }
 
+
+function loadLocale(locale: string) {
+  // hard coded list works with esbuild. Source https://github.com/angular/angular-cli/issues/26904#issuecomment-1903596563
+
+  var list = {
+      'ar': () => import('@angular/common/locales/ar'),
+      'cs': () => import('@angular/common/locales/cs'),
+      'en': () => import('@angular/common/locales/en'),
+      'en-GB': () => import('@angular/common/locales/en-GB'),
+      'es': () => import('@angular/common/locales/es'),
+      'de': () => import('@angular/common/locales/de'),
+      'fi': () => import('@angular/common/locales/fi'),
+      'fr': () => import('@angular/common/locales/fr'),
+      'hi': () => import('@angular/common/locales/hi'),
+      'hu': () => import('@angular/common/locales/hu'),
+      'is': () => import('@angular/common/locales/is'),
+      'it': () => import('@angular/common/locales/it'),
+      'pt': () => import('@angular/common/locales/pt'),
+      'tr': () => import('@angular/common/locales/tr'),
+      'ru': () => import('@angular/common/locales/ru'),
+      'ro': () => import('@angular/common/locales/ro'),
+      'sk': () => import('@angular/common/locales/sk'),
+      'sl': () => import('@angular/common/locales/sl'),
+      'zh-Hans': () => import('@angular/common/locales/zh-Hans'),
+      'zh-Hant': () => import('@angular/common/locales/zh-Hant')
+  }
+  return list[locale]();
+}
+
+export function registerLocaleForEsBuild(
+  {
+      cultureNameLocaleFileMap = {},
+      errorHandlerFn = defaultLocalErrorHandlerFn,
+  } = {} as RegisterLocaleData,
+) {
+  return (locale: string): Promise<any> => {
+      localeMap = { ...differentLocales, ...cultureNameLocaleFileMap };
+      const l = localeMap[locale] || locale;
+      var localeSupportList = "ar|cs|en|en-GB|es|de|fi|fr|hi|hu|is|it|pt|tr|ru|ro|sk|sl|zh-Hans|zh-Hant".split("|");
+
+      if (localeSupportList.indexOf(locale) == -1) {
+          return;
+      }
+      return new Promise((resolve, reject) => {
+          return loadLocale(l)
+              .then(val => {
+                  let module = val;
+                  while (module.default) {
+                      module = module.default;
+                  }
+                  resolve({ default: module });
+              })
+              .catch(error => {
+                  errorHandlerFn({
+                      resolve,
+                      reject,
+                      error,
+                      locale,
+                  });
+              });
+      });
+  };
+}
+
+
+
 export function registerLocale(
   {
     cultureNameLocaleFileMap = {},