build_hooks.ts

const globals = {
  'tslib': 'tslib',

  '@angular/animations': 'ng.animations',
  '@angular/core': 'ng.core',
  '@angular/common': 'ng.common',
  '@angular/forms': 'ng.forms',
  '@angular/http': 'ng.http',
  '@angular/platform-browser': 'ng.platformBrowser',
  '@angular/platform-browser-dynamic': 'ng.platformBrowserDynamic',
  '@angular/platform-browser/animations': 'ng.platformBrowser.animations',
  '@angular/router': 'ng.router',
  '@ng-bootstrap/ng-bootstrap': 'bootstrap',
  'rxjs/Rx': 'Rx',
  'rxjs/ReplaySubject': 'Rx.ReplaySubject',
  'rxjs/BehaviorSubject': 'Rx.BehaviorSubject',
  'rxjs/Subject': 'Rx.Subject',
  'rxjs/Observable': 'Rx.Observable'
};

export function jestConfig(config): void {
  if (!config.moduleNameMapper) {
    config.moduleNameMapper = {};
  }

  config.moduleNameMapper['(.*)'] = '<rootDir>/src/$1';
}

export function tsconfig(config) {
  if (!config.angularCompilerOptions) {
    config.angularCompilerOptions = {};
  }
  config.angularCompilerOptions.strictMetadataEmit = false;
}

export function rollupFESM(config) {
  if (config.external) {
    config.external = config.external.concat(Object.keys(globals));
  } else {
    config.external = Object.keys(globals);
  }

  config.globals = Object.assign(config.globals || {}, globals);
}

export const rollupUMD = rollupFESM;