QResizeObserver 是一个 Quasar 组件，每当封装的 DOM 元素/组件（定义为 QResizeObserver 的直接父级）更改其大小（宽度和/或高度）时，它都会发出 resize 事件。请注意，不涉及轮询，但过度使用轮询也会造成高昂的成本。

¥QResizeObserver is a Quasar component that emits a resize event whenever the wrapping DOM element / component (defined as direct parent of QResizeObserver) changes its size (width and/or height). Note that no polling is involved, but overusing it is costly too.

用法(Usage)

¥Usage

请注意，QResizeObserver 在渲染并附加到 DOM 后会立即触发事件，因此你可以获得容器的初始大小。

¥Please note that QResizeObserver will issue an event as soon as it gets rendered and attached to DOM, so you can have the initial size of the container.