/**
 * @license
 *-------------------------------------------------------------------------------------------
 * Copyright © 2026 Progress Software Corporation. All rights reserved.
 * Licensed under commercial license. See LICENSE.md in the package root for more information
 *-------------------------------------------------------------------------------------------
 */
/**
 * Utilities for cleaning up ProseMirror and DOM resources to prevent memory leaks
 */
/**
 * Recursively destroys all child nodes and removes attributes from a DOM node
 * @param node - The DOM node to destroy
 * @hidden
 */
export declare const destroyNode: (node: Node) => void;
/**
 * Cleans up ProseMirror EditorView internal references and destroys the view
 * This breaks circular references and releases DOM nodes held by ProseMirror
 * @param view - The ProseMirror EditorView instance
 * @returns The view's DOM element before it was nullified (for cleanup)
 * @hidden
 */
export declare const cleanupAndDestroyProseMirrorView: (view: any) => Element | null;
/**
 * Cleans up an iframe and its document to release memory
 * @param iframe - The iframe element to clean up
 * @param contentElement - Optional content element to destroy
 * @hidden
 */
export declare const cleanupIframe: (iframe: HTMLIFrameElement, contentElement?: Element | null) => void;
/**
 * Nullifies all properties on an object to break references
 * Useful for breaking Vue's reactivity wrapper (markRaw)
 * @param obj - The object to nullify
 * @hidden
 */
export declare const nullifyObjectProperties: (obj: any) => void;