/**
 * Utility functions for module format handling
 */
import type { ModuleFormat } from "../types";
/**
 * Utility class for handling module format operations
 */
export declare class ModuleFormatUtils {
    /**
     * Get file extension for a given module format
     */
    static getExtensionForFormat(format: ModuleFormat): string;
    /**
     * Check if a format is supported in the current environment
     */
    static isFormatSupported(format: ModuleFormat): boolean;
    /**
     * Get the optimal format for the current environment
     */
    static getOptimalFormat(availableFormats: ModuleFormat[]): ModuleFormat;
    /**
     * Detect module format from URL or content
     */
    static detectFormatFromUrl(url: string): ModuleFormat | null;
    /**
     * Check if ESM is supported in the current environment
     */
    private static supportsESM;
    /**
     * Normalize module URL for a specific format
     */
    static normalizeUrlForFormat(url: string, format: ModuleFormat): string;
    /**
     * Get MIME type for a module format
     */
    static getMimeType(format: ModuleFormat): string;
}
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