import ts from 'typescript';
/**
 * CommonJS to ESM transformer options
 */
export interface ICjsToEsmTransformerOptions {
    /**
     * Optional filtering callback to indicate whether to
     * transform a `require(request)` call to an import statement,
     * based on its request string.
     */
    shouldTransform?(request: string): boolean;
}
/**
 * Transforms CommonJS calls/exports to ESM syntax.
 * If a source file is identified as using `require`, `module`, or `exports`,
 * it is wrapped with the following:
 * ```
 * [generated imports]
 * let exports = {}, module = { exports }
 *
 * [original code]
 *
 * export default module.exports
 * ```
 *
 * Each `require(...)` call is converted to a generated import statement
 * with a unique identifier.
 */
export declare function createCjsToEsmTransformer(options?: ICjsToEsmTransformerOptions): ts.TransformerFactory<ts.SourceFile>;
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