type Values = Record<string, any>;
/**
 * A user defined component
 *
 * @example
 *
 * ```js
 * class MyComponent implements Component {
 *   render({ color, children }) {
 *     return h("h1", style: { "background": "red" }, "In the red");
 *   }
 * }
 * ```
 */
export interface IComponent<TProps extends Values = {}, TContext extends Values | null = null> {
    /**
     * Method returning the virtual DOM for the component
     *
     * @param props the properties for the component
     * @param context the rendering context
     * @returns the virtual DOM for the component
     */
    render?(props: TProps, context: TContext): JSX.Nodes;
    /**
     * Is invoked just before a component is mounted.
     *
     * This method is a good place to initialize any observables before the first
     * render.
     */
    willMount?(): void;
    /**
     * Is invoked immediately after a component is mounted.
     *
     * This method is a good place to set up any subscriptions. If you do that,
     * don’t forget to unsubscribe in willUnmount().
     */
    didMount?(): void;
    /**
     * Is invoked immediately before a component is unmounted and destroyed.
     *
     * Perform any necessary cleanup in this method, such as invalidating timers,
     * canceling network requests, or cleaning up any subscriptions that were
     * created in didMount().
     */
    willUnMount?(): void;
    /**
     * Use this as an opportunity to operate on the DOM when the component has
     * been updated.
     */
    didUpdate?(): void;
    /**
     * Is invoked after each render.
     *
     * This method is a good place to invoke loading of data, or operate on the rendered DOM.
     */
    didRender?(): void;
    /**
     * This lifecycle is invoked after an error has been thrown by a descendant component.
     *
     * @param error the error that was thrown.
     */
    didCatch?(error: Error): void;
}
export declare abstract class Component<TProps extends Values = {}, TContext extends Values | null = null> implements IComponent<TProps, TContext> {
    constructor(props: TProps, context: TContext);
    readonly props: TProps;
    readonly context: TContext;
    abstract render?(props: TProps, context: TContext): JSX.Nodes;
}
type PortalProps = {
    target?: HTMLElement;
    children: JSX.Nodes;
};
export declare class Portal extends Component<PortalProps> {
    render({ children, ...props }: PortalProps): {
        type: string;
        props: {
            target?: HTMLElement;
        };
        children: JSX.Nodes;
    };
}
type ContextProps = Record<string, any>;
export declare class Context extends Component<ContextProps> {
    render({ children, ...props }: ContextProps): {
        type: string;
        props: {
            [x: string]: any;
        };
        children: any;
    };
}
export {};