import type { UserConfig } from "vite";
export interface DefineConfigOptions extends UserConfig {
    /**
     * Specify additional CSS styles to be
     * injected into the main index file.
     */
    styles?: string;
    /**
     * Set to `true` to not apply default
     * GitHub Markdown styles to iframes.
     * @default false
     */
    resetStyles?: boolean;
    /**
     * Specify the default branch used to
     * permalink relative URLs in the README.
     * @default "master"
     */
    branch?: string;
}
declare type DefineConfig = (options?: DefineConfigOptions) => UserConfig & {
    test: {
        globals: boolean;
        environment?: string;
    };
};
export declare const defineConfig: DefineConfig;
export {};