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/**
* Determine if the testing element is visible on screen no matter if its on the viewport or not
*/
export declare const isVisible: (element: HTMLElement) => boolean;
export declare const obtainAllFocusableElements: (element: HTMLElement) => HTMLElement[];
/**
* @desc Determine if target element is focusable
* @param element {HTMLElement}
* @returns {Boolean} true if it is focusable
*/
export declare const isFocusable: (element: HTMLElement) => boolean;
/**
* @desc Set Attempt to set focus on the current node.
* @param element
* The node to attempt to focus on.
* @returns
* true if element is focused.
*/
export declare const attemptFocus: (element: HTMLElement) => boolean;
/**
* Trigger an event
* mouseenter, mouseleave, mouseover, keyup, change, click, etc.
* @param {HTMLElement} elm
* @param {String} name
* @param {*} opts
*/
export declare const triggerEvent: (elm: HTMLElement, name: string, ...opts: Array<boolean>) => HTMLElement;
export declare const isLeaf: (el: HTMLElement) => boolean;
export declare const getSibling: (el: HTMLElement, distance: number, elClass: string) => Element | null;
export declare const focusNode: (el: HTMLElement) => void;