export declare function setAttributeIfChanged(element: Element, name: string, value: string | number | boolean): void;
export declare function removeAttributeIfPresent(element: Element, name: string): void;
export declare function setPropertyIfChanged<T, K extends keyof T>(object: T, key: K, value: T[K]): void;
export declare function setStylePropertyIfChanged(style: CSSStyleDeclaration, property: string, value: string): void;
export declare function removeStylePropertyIfPresent(style: CSSStyleDeclaration, property: string): void;
type ViewPort = {
    left: number;
    right: number;
    top: number;
    bottom: number;
};
export declare const getFirstVisibleNodeForPositionRelativeTo: (documentOrElement: Document | Element, viewport: ViewPort) => {
    node: Node;
    offset: number;
} | undefined;
export declare const getRangeFromNode: (node: Node, offset: number) => Range | undefined;
export declare const isPointerEvent: (event: Event) => event is PointerEvent;
export declare const isMouseEvent: (event: Event) => event is MouseEvent;
export declare const isTouchEvent: (event: Event) => event is TouchEvent;
export declare const noopElement: () => HTMLDivElement;
export declare const getElementsWithAssets: (_document: Document | null | undefined) => Element[];
export declare const revokeDocumentBlobs: (_document: Document | null | undefined) => void;
export declare function hasShape<T>(obj: unknown, requiredProps: (keyof T)[], optionalMethods?: (keyof T)[]): obj is T;
export declare function isHtmlElement(element: unknown): element is HTMLElement;
export declare function isHtmlTagElement<K extends keyof HTMLElementTagNameMap>(element: unknown, tagName: K): element is HTMLElementTagNameMap[K];
export declare function isHtmlRange(element: unknown): element is Range;
export declare const injectCSS: (doc: Document, id: string, style: string, prepend?: boolean) => () => void;
export declare const removeCSS: (doc: Document, id: string) => void;
export {};