/**
 * Transformer class for compiling TSX source code at runtime.
 * Uses @babel/standalone to transform JSX syntax into jsx() function calls.
 *
 * Works in both Node.js and browser environments.
 */
export interface TransformOptions {
    /** Additional Babel plugins to include in the transform. Each entry is [pluginName, options]. */
    extraPlugins?: Array<[string, Record<string, unknown>]>;
}
export declare class Transformer {
    /**
     * Transform a source string containing TSX code.
     * Works in both Node.js and browser environments.
     *
     * @param source - The TSX source code to transform
     * @param filename - Filename used for error messages and source maps
     * @param options - Optional transform configuration (e.g., extra plugins)
     * @returns The transformed JavaScript code
     * @throws Error if transformation fails
     */
    transformSourceAsync(source: string, filename: string, options?: TransformOptions): Promise<string>;
}
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