#import <DOM/Element.idl>

// https://drafts.csswg.org/resize-observer-1/#resize-observer-interface
[Exposed=(Window)]
interface ResizeObserver {

    constructor(ResizeObserverCallback callback);
    undefined observe(Element target, optional ResizeObserverOptions options = {});
    undefined unobserve(Element target);
    undefined disconnect();

};

enum ResizeObserverBoxOptions {
    "border-box", "content-box", "device-pixel-content-box"
};

dictionary ResizeObserverOptions {
    ResizeObserverBoxOptions box = "content-box";
};

// https://drafts.csswg.org/resize-observer-1/#resize-observer-callback
callback ResizeObserverCallback = undefined (sequence<ResizeObserverEntry> entries, ResizeObserver observer);