import { html, svg } from 'lit-html';
import { Signal } from 'signal-polyfill';
export { html, svg };
export type RenderFunction = () => ReturnType<typeof html>;
export type CleanupFunction = () => void;
export type EffectFunction = () => CleanupFunction | void;
export type StylePropsFunction = (props: Record<string, string | number | null>) => void;
type AttributeSignals<Attrs extends string> = {
    [K in Attrs]: Signal.State<string | null>;
};
export type ComponentContext<Attrs extends string = never> = AttributeSignals<Attrs> & {
    internals: ElementInternals;
    effect: (fn: EffectFunction) => void;
    styleProps: StylePropsFunction;
};
export type FunctionalComponent<Attrs extends string = never> = (context: ComponentContext<Attrs>) => RenderFunction;
export interface DefineOptions<Attrs extends string = never> {
    setup: FunctionalComponent<Attrs>;
    tagName?: string;
    attributes?: Attrs[];
    useShadow?: boolean;
    formAssociated?: boolean;
    styles?: string;
}
declare function lightElement(fn: FunctionalComponent): void;
declare function lightElement(styles: string, fn: FunctionalComponent): void;
declare function lightElement<Attrs extends string>(observedAttributes: Attrs[], fn: FunctionalComponent<Attrs>): void;
declare function lightElement<Attrs extends string>(observedAttributes: Attrs[], styles: string, fn: FunctionalComponent<Attrs>): void;
declare function shadowElement(fn: FunctionalComponent): void;
declare function shadowElement(styles: string, fn: FunctionalComponent): void;
declare function shadowElement<Attrs extends string>(observedAttributes: Attrs[], fn: FunctionalComponent<Attrs>): void;
declare function shadowElement<Attrs extends string>(observedAttributes: Attrs[], styles: string, fn: FunctionalComponent<Attrs>): void;
declare const state: <T>(value: T) => Signal.State<T>;
declare const computed: <T>(fn: () => T) => Signal.Computed<T>;
export { state, computed, lightElement, shadowElement };
export declare function define<Attrs extends string = never>(options: DefineOptions<Attrs>): void;
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