/**
 * Solid 2 port of Base UI React's `adaptiveOrigin` middleware
 * (`packages/react/src/utils/adaptiveOriginMiddleware.ts`).
 *
 * When the floating element has a CSS transition active, this middleware
 * rewrites the positioning coordinates so the popup anchors to the side
 * opposite the transition's starting origin. That lets consumers animate
 * `transform` / `opacity` without the popup jumping from a stale rect
 * while the transition is mid-flight.
 */
import type { Middleware } from "@floating-ui/dom";
export declare const DEFAULT_SIDES: {
    readonly sideX: "left";
    readonly sideY: "top";
};
export declare const adaptiveOriginMiddleware: Middleware;
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