@angular-devkit/build-angular/src/babel/babel-loader.d.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

declare module 'babel-loader' {
  type BabelLoaderCustomizer<T> = (
    babel: typeof import('@babel/core'),
  ) => {
    customOptions?(
      this: import('webpack').loader.LoaderContext,
      loaderOptions: Record<string, unknown>,
      loaderArguments: { source: string; map?: unknown },
    ): Promise<{ custom?: T; loader: Record<string, unknown> }>;
    config?(
      this: import('webpack').loader.LoaderContext,
      configuration: import('@babel/core').PartialConfig,
      loaderArguments: { source: string; map?: unknown; customOptions: T },
    ): import('@babel/core').TransformOptions;
  };
  function custom<T>(customizer: BabelLoaderCustomizer<T>): import('webpack').loader.Loader;
}