import { type Mountable } from './build-context.js';
import type { Renderable } from './element.js';
/** Render `content` into `target` (default `document.body`) instead of inline —
 * for overlays (dialog/popover/toast). The content's bindings join the current
 * scope (so it stays reactive); a teardown removes the nodes on unmount/dispose.
 * Returns an inline placeholder comment. */
export declare function portal(content: () => Renderable, target?: Element): Mountable;
export interface Context<T> {
    readonly id: symbol;
    readonly default: T;
}
export declare function createContext<T>(defaultValue: T, name?: string): Context<T>;
/** Provide `value` for `context` to everything `render` builds, then restore. */
export declare function provide<T>(context: Context<T>, value: T, render: () => Renderable): Mountable;
/** Read the nearest provided value for `context`, or its default. Outside a
 * signal build (e.g. a unit test calling `connect()` directly) no provider can
 * exist, so the default is returned rather than throwing. */
export declare function useContext<T>(context: Context<T>): T;
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