/**
 * Renders attributes to the given element based on the `attrInfo` object where
 * boolean values are added/removed as attributes.
 * @param {*} element Element on which to set attributes.
 * @param {*} attrMap Object describing attributes.
 */
export declare function renderAttributes(element: HTMLElement, attrMap: {
    [key: string]: string | boolean | number;
}): void;
/**
 * Traverses the roots and returns the first match.
 * @param $elem
 * @param query
 */
export declare function queryParentRoots<T>($elem: Element, query: string): T[];
/**
 * Traverses the tree of active elements down the shadow tree.
 * @param activeElement
 */
export declare function traverseActiveElements(activeElement?: Element | null): Element | null;
/**
 * Returns the assigned elements to the first matching slot of the shadow root.
 * @param root
 */
export declare function getSlottedElements(root: ShadowRoot): Element[];
/**
 * Remove all children from a container.
 * @param $container
 */
export declare function removeChildren($container: HTMLElement): void;
/**
 * Sanitizes dangerous HTML.
 * @param html
 */
export declare function sanitize(html: string): string;
/**
 * Determines whether the element is hidden in the DOM.
 * https://stackoverflow.com/questions/19669786/check-if-element-is-visible-in-dom
 * @param $elem
 * @param style
 */
export declare function isHidden($elem: HTMLElement, style?: CSSStyleDeclaration): boolean;
/**
 * Sets a css property on an element.
 * @param name
 * @param value
 * @param $target
 */
export declare function setProperty(name: string, value: string, $target?: HTMLElement): void;
/**
 * Removes a css property on an element.
 * @param name
 * @param $target
 */
export declare function removeProperty(name: string, $target?: HTMLElement): void;