ResizeObserverinterface ResizeObserver {disconnect(): void;observe(target: Element, options?: ResizeObserverOptions): void;unobserve(target: Element): void;}var ResizeObserver: {prototype: ResizeObserver; new (callback: ResizeObserverCallback): ResizeObserver; };§Methods§disconnect(): void[src]§observe(target: Element, options?: ResizeObserverOptions): void[src]§unobserve(target: Element): void[src]