--- meta: title: Resize Observer description: The Resize Observer component offers a thin, declarative interface to the ResizeObserver API. layout: component --- The resize observer will report changes to the dimensions of the elements it wraps through the `sl-resize` event. When emitted, a collection of [`ResizeObserverEntry`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserverEntry) objects will be attached to `event.detail` that contains the target element and information about its dimensions. ```html:preview