/** Join string classes without discarding the consumer's class. */
export declare function cx(...values: Array<string | false | null | undefined>): string;
/** Class hook shared by JSX, template frameworks and custom-element hosts. */
export declare function partClass(component: string, part: string): string;
/** Framework-neutral data hooks, with an inherited family taking precedence. */
export declare function partData(component: string, part: string, inheritedComponent?: string): {
    'data-part': string;
    'data-skdx-component'?: string;
};
/** React's string class convention, without depending on React. */
export declare function stringPart(component: string, part: string, className?: string, inheritedComponent?: string): {
    className: string;
    'data-part': string;
    'data-skdx-component'?: string;
};
/** Preserve framework class values (objects/arrays) without flattening them. */
export declare function arrayPart<T>(component: string, part: string, className?: T | null, inheritedComponent?: string): {
    class: (string | T | null | undefined)[];
    'data-part': string;
    'data-skdx-component'?: string;
};