/** Query element with flexible conditions */
export declare function query(qry: string, ctx: Element | Document): HTMLElement | HTMLCollectionOf<any> | NodeListOf<Element>;
/** 创建元素 */
export declare function element<K extends keyof HTMLElementTagNameMap>(name: K): HTMLElementTagNameMap[K];
export declare function svgElement<K extends keyof SVGElementTagNameMap>(name: K): SVGElement;
export declare function text(data: string): Text;
export declare function space(): Text;
export declare function empty(): Text;
export declare function attr(node: Element, attribute: string, value?: string): void;
export declare function setAttr(node: Element & ElementCSSInlineStyle, attributes: {
    [x: string]: string;
}): void;
export declare function setCustomElementData(node: Element & ElementCSSInlineStyle, prop: string, value: string): void;
export declare function xlinkAttr(node: Element & ElementCSSInlineStyle, prop: string, value: string): void;
export declare function append(target: Node, node: Node): void;
export declare function insert(target: Node, node: Node, anchor?: Node): void;
export declare function children(element: Element): ChildNode[];
export declare function detach(node: Node): void;
/** 判断元素是否可见 */
export declare function isElementVisible(elem: HTMLElement): boolean;
export interface ElemPosition {
    x: number;
    y: number;
}
export declare const getPostionByHTMLElement: (e: HTMLElement, center?: boolean) => ElemPosition;