import type { StrictlyResolver } from '../locator/index.js';
import type { PostcssTransformerOptions } from './postcss-transformer.js';
/**
 * The value returned from the transformer.
 * `false` means to skip transpiling on that file.
 */
export type TransformResult = {
    /** The transformed code. */
    css: string;
    /** The source map from the transformed code to the original code. */
    map: string | object;
    dependencies: (string | URL)[];
} | false;
export type TransformerOptions = {
    /** The path of the file to transform. */
    from: string;
    /** The function to resolve the path of the imported file. */
    resolver: StrictlyResolver;
    /**
     * Whether the specifier should be ignored.
     * For example, specifiers starting with `http://` or `https://` should be ignored.
     */
    isIgnoredSpecifier: (specifier: string) => boolean;
};
/** The function to transform source code. */
export type Transformer = (source: string, options: TransformerOptions) => TransformResult | Promise<TransformResult>;
export declare const handleImportError: (packageName: string) => (e: unknown) => never;
export type DefaultTransformerOptions = PostcssTransformerOptions;
export declare const createDefaultTransformer: (defaultTransformerOptions?: DefaultTransformerOptions) => Transformer;