/**
 * @license
 * Copyright 2022 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import type { TemplateResult } from 'lit';
import type { TestRunnerPlugin } from '@web/test-runner';
export interface LitSsrPluginOptions {
    /**
     * These modules will be imported from each newly created worker.
     * (A worker is created for each call to render a template via SSR).
     * This allows registering hooks for Node.js or general setup.
     */
    workerInitModules?: string[];
}
export interface Payload {
    template: TemplateResult;
    modules: string[];
}
export interface PayloadWithWorkerInitModules extends Payload, Required<LitSsrPluginOptions> {
}
export declare function litSsrPlugin(options?: LitSsrPluginOptions): TestRunnerPlugin<Payload>;
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