/**
 * Checks whether the element or any of its ancestors is marked as `inert`.
 *
 * @internal
 */
export declare function isInInertSubtree(element: Element | null): boolean;
/**
 * Checks whether an element is reachable by pressing `Tab`. `isFocusable` only
 * inspects `tabIndex`, `nodeName` and `disabled`, so it also reports elements
 * the browser skips — those that are not rendered (`display: none`, `hidden`,
 * `visibility: hidden`, `content-visibility: hidden`) or that live inside an
 * `inert` subtree. Relying on `isFocusable` alone therefore yields tab-order
 * boundaries the browser never visits.
 *
 * @internal
 */
export declare function isTabbable(node: Node): boolean;
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