export declare class AttrUtils {
    private static readonly emptyObject;
    static setElementAttribute(obj: HTMLElement, attrName: string, value: string): void;
    static setStyleAttribute(obj: CSSStyleDeclaration, attrName: string, value: string): void;
    static getElementAttribute(obj: HTMLElement, attrName: string): string | null;
    static getStyleAttribute(obj: CSSStyleDeclaration, attrName: string): string | null;
    static removeElementAttribute(obj: HTMLElement, attrName: string): void;
    static removeStyleAttribute(obj: CSSStyleDeclaration, attrName: string): void;
    static changeElementStyleAttribute(obj: HTMLElement, attrName: string, newValue: string): void;
    static restoreElementStyleAttribute(obj: HTMLElement, attrName: string): boolean;
    static saveStyleAttributeInElement(obj: HTMLElement, attrName: string): void;
    private static isExistsAttributeInElement;
    private static isAttributeExists;
}
//# sourceMappingURL=attr.d.ts.map