type Nullable<T> = T extends null | undefined ? T : never;
declare function isNullable<T>(value: T): value is Nullable<T>;
declare function isNonNullable<T>(value: T): value is NonNullable<T>;
declare function isString(value: any): value is string;
declare function isNode(value: any): value is Node;
declare function isHTMLElement(value: any): value is HTMLElement;
declare function isHTMLInputElement(value: any): value is HTMLInputElement;
declare function isHTMLAnchorElement(value: any): value is HTMLAnchorElement;
declare function isHTMLButtonElement(value: any): value is HTMLButtonElement;
declare function isHTMLDialogElement(value: any): value is HTMLDialogElement;
type HasDisabled = {
    disabled?: boolean;
};
declare function elementIsDisabled(element: HTMLElement | (HTMLElement & HasDisabled)): boolean;
export { isNullable, isNonNullable, isString, isNode, isHTMLElement, isHTMLInputElement, isHTMLAnchorElement, isHTMLButtonElement, isHTMLDialogElement, elementIsDisabled, };