/**
 * Toast clearance for sticky action bars (gh#1271).
 *
 * The Toaster stacks bottom-right, and a page's sticky action bar (`PageContainer stickyFooter`,
 * `MobileShell actions` + `tabBar`) is pinned to the same edge — so without this a stack of three
 * success toasts sits on top of the submit button that raised them. The bar publishes its own
 * block size on `<html>` as `--toast-sticky-bar-height`; the Toaster adds that length to its bottom
 * offset (`sonner.tsx`). The tier file declares the property `0px`, so with no bar mounted — or
 * the bar hidden — the toaster's offset is exactly what it was before.
 *
 * Internal: reachable from no published subpath.
 */
import { type RefObject } from "react";
/** The custom property the Toaster reads. Declared `0px` in `src/tokens/components/feedback.css`. */
export declare const TOAST_STICKY_BAR_PROPERTY = "--toast-sticky-bar-height";
/**
 * While `enabled`, publish the summed border-box block size of `refs` on `<html>` and keep it
 * current with a `ResizeObserver`; remove it when disabled or unmounted.
 *
 * `offsetHeight`, not `getBoundingClientRect()`: the reveal footer slides in with a `transform`,
 * and a transform must not leak into the clearance mid-transition. Everything runs in an effect,
 * so SSR never touches `document`. One page-level bar at a time is the assumed shape: a second
 * mounted bar overwrites the first's value, and either unmount clears it.
 */
export declare function useToastStickyBarClearance(refs: ReadonlyArray<RefObject<HTMLElement | null>>, enabled: boolean): void;