/**
 * `Slot` - forked from @radix-ui/react-slot (MIT, © WorkOS), inlined so
 * `veryfront/chat` takes no external Radix dependency. Merges its props onto a
 * single child element (the `asChild` pattern): className is concatenated,
 * style is shallow-merged, event handlers are chained (child first by default),
 * and refs are composed. The `disabled` contract gives composed controls a
 * capture-phase gate that suppresses primary, auxiliary, keyboard, and default
 * activation across Slot and child handlers.
 *
 * Scoped to the single-child case Veryfront's UI primitives use; Radix's
 * `Slottable`/lazy-children handling is intentionally omitted.
 *
 * @module react/components/ui/slot
 */
import * as React from "react";
/** Element attributes used by a control that may slot a native button. */
export type PolymorphicButtonAttributes<T extends HTMLElement> = T extends HTMLButtonElement ? React.ButtonHTMLAttributes<HTMLButtonElement> : React.HTMLAttributes<T>;
/**
 * Resolve button submission semantics for a native or slotted control.
 * Native controls and intrinsic slotted buttons default to `type="button"`.
 * Intrinsic non-buttons and opaque components never receive a button-only
 * attribute; an opaque component that renders a button must own its `type`.
 */
export declare function getPolymorphicButtonType(asChild: boolean | undefined, child: React.ReactNode): "button" | undefined;
export declare function getPolymorphicButtonType(asChild: boolean | undefined, child: React.ReactNode, type: React.ButtonHTMLAttributes<HTMLButtonElement>["type"]): React.ButtonHTMLAttributes<HTMLButtonElement>["type"] | undefined;
/** Compose multiple refs into one callback ref. */
export declare function composeRefs<T>(...refs: Array<React.Ref<T> | undefined>): React.RefCallback<T>;
/** Props accepted by `<Slot>`. */
export interface SlotProps extends React.HTMLAttributes<HTMLElement> {
    children?: React.ReactNode;
    /** Block activation when an asChild consumer uses non-native disabled markup. */
    disabled?: boolean;
    /** Button submission behavior for slotted button-like controls. */
    type?: React.ButtonHTMLAttributes<HTMLButtonElement>["type"];
}
/** Render `Slot` — merge props onto its single child element. */
export declare const Slot: React.ForwardRefExoticComponent<SlotProps & React.RefAttributes<HTMLElement>>;
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