import { Computed } from "native-signal/weak";
import { Component } from "../components/Component";
interface Reactive<T = unknown> {
    get(): T;
}
export type A = number | A[];
export type Child = Node | string | number | bigint | boolean | null | undefined | JSX.Element | Comment | DocumentFragment | Text | Reactive<Child> | Promise<Child> | {
    to_html(): Child;
} | Child[];
export declare function is_reactive(v: unknown): v is Reactive;
export interface Slot {
    start: Comment;
    end: Comment;
    children_computeds: Computed<unknown>[];
}
export declare function create_slot(label: string): Slot;
export declare function clear_slot(slot: Slot): void;
export declare function fill_slot(slot: Slot, nodes: Node[]): void;
export declare function normalize_child(child: Child, owner: Node, slot: Slot | null): Node[];
export declare function mount_reactive(signal: Reactive, _owner: Node, parent_slot: Slot | null): Node[];
export declare function mount_promise(promise: Promise<Child>, owner: Node): Node[];
export declare function bind_style_signal(el: HTMLElement, key: string, signal: Reactive): void;
export declare function apply_style_prop(el: HTMLElement, value: unknown, key?: string): void;
export declare function apply_prop(el: Element, key: string, value: unknown): void;
export declare function apply_props(el: Element, props: Record<string, unknown> | null): void;
export declare function swap_slot(start: Comment, end: Comment, nodes: Node[]): void;
/** Eagerly materialise a Child/Child[] into a stable flat Node[]. */
export declare function materialise(content: Child | Child[], owner: Node): Node[];
export declare function h(tag: string | typeof Fragment | (new (p: any) => Component), props: Record<string, any> | null, ...children: Child[]): JSX.Element | Component<any>;
export declare function Fragment(_props?: {
    children?: Child;
}): unknown;
export {};
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