import type { Bud } from '@roots/bud-framework';
export interface when {
    (test: ((app: Bud) => boolean) | Array<((app: Bud) => boolean) | boolean> | boolean, trueCase: ((app: Bud) => any) | Array<(app: Bud) => any>, falseCase?: ((app: Bud) => any) | Array<(app: Bud) => any>): Bud;
}
/**
 * Executes a function if a given test is true
 *
 * @remarks
 * - The first parameter is the conditional check.
 * - The second parameter is the function to run if true.
 * - The third parameter is optional; executed if the conditional is not true.
 *
 * @example
 * Only produce a vendor bundle when running in `production`:
 *
 * ```js
 * bud.when(bud.isProduction, () => bud.vendor())
 * ```
 *
 * @example
 * Use `eval` sourcemap in development mode and `hidden-source-map` in production:
 *
 * ```js
 * bud.when(
 *   bud.isDevelopment,
 *   () => bud.devtool('eval'),
 *   () => bud.devtool('hidden-source-map'),
 * )
 * ```
 */
export declare function when(test: ((app: Bud) => boolean) | Array<((app: Bud) => boolean) | boolean> | boolean, trueCase: ((app: Bud) => any) | Array<(app: Bud) => any>, falseCase?: ((app: Bud) => any) | Array<(app: Bud) => any>): Bud;