export declare const EXTENSIONS_BY_TYPE: Record<string, string>;
export declare const TYPES_BY_EXTENSION: Record<string, string>;
export declare const identity: <T>(value?: T) => T | undefined;
export declare const injectLiveReloadScript: (html: string) => string;
export declare function resolveUrlPathnameUnderServeRoot(rootDir: string, urlPathname: string): string | null;