import React from 'react';
import { RuleInput } from './rules.js';
export type FormWhenProps = {
    rule: RuleInput;
    children?: React.ReactNode;
};
/**
 * Conditionally renders a group of fields by a single rule, computed against
 * the form's current `values`.
 *
 * Visible → a Fragment (NOT a wrapper element: fields live in the `Form.Fields`
 * CSS grid and any wrapper DOM node would break the column layout). Hidden →
 * `null`, a full unmount — children's internal state resets, but their values
 * persist in the form context (the U1/U4 contract; nothing for When to do).
 *
 * Nested `<Form.When>` combine as AND naturally: an outer hidden When returns
 * null, so the inner one never renders.
 *
 * The static `formNodeType = 'when'` marker lets the form's structural scan
 * recognize the node by string marker (never by component reference).
 */
type FormWhenComponent = ((props: FormWhenProps) => React.JSX.Element | null) & {
    formNodeType: 'when';
    displayName?: string;
};
declare const When: FormWhenComponent;
export default When;