import { Configuration } from 'webpack';
import { RuleSetRuleWithStrategy } from './common';
export interface ParsedImport {
    url: string;
    media: string;
}
export interface CssModuleOptions {
    /**
     * @default 'local'
     */
    mode?: 'local' | 'global' | string;
    /**
     * @default '[hash:base64]'
     * @example
     * - use '[path][name]__[local]' for development.
     * - use '[hash:base64]' for production.
     */
    localIdentName?: string;
    context?: string;
    hashPrefix?: string;
    getLocalIdent?: (context: string, localIdentName: string, localName: string, options: any) => string;
    localIdentRegExp?: string | RegExp;
}
export interface CSSLoaderOptions {
    url?: boolean | ((url: string, resourcePath: string) => boolean);
    import?: boolean | ((parsedImport: ParsedImport, resourcePath: string) => boolean);
    modules?: boolean | CssModuleOptions['mode'] | string | CssModuleOptions;
    sourceMap?: boolean;
    importLoaders?: number;
    /**
     * @default 'asIs'
     */
    localsConvention?: 'asIs' | 'camelCase' | 'camelCaseOnly' | 'dashes' | 'dashesOnly' | string;
    onlyLocals?: boolean;
    esModule?: boolean;
}
export interface Px2remOptions {
    /**
     * @default 2
     */
    baseDpr?: number;
    /**
     * @default 75
     */
    remUnit?: number;
    /**
     * @default 6
     */
    remPrecision?: number;
    /**
     * @default 'px'
     */
    forcePxComment?: string;
    /**
     * @default 'no'
     */
    keepComment?: string;
}
export interface CSSRule extends RuleSetRuleWithStrategy {
    options?: CSSLoaderOptions;
    px2rem?: Px2remOptions | boolean;
    modules?: CSSLoaderOptions['modules'];
    esModule?: boolean;
}
/**
 * Support importing CSS.
 * @example
 * // Use default options.
 * module.exports = merge({
 *     css(),
 *     { ...others },
 * });
 * @example
 * // Use less-loader.
 * module.exports = merge({
 *     css({
 *         test: /\.(less|css)$/,
 *         'use.append': ['less-loader'],
 *     }),
 *     { ...others },
 * });
 */
export declare function css({ modules, esModule, px2rem, ...rule }?: CSSRule): Configuration;