observe-rect:观察DOM元素的Rect

观察DOM元素的矩形。 安装 npm install @reach/observe-rect # or yarn add @reach/observe-rect 用法 import observeRect from "@reach/observe-rect" ; let node = document . getElementById ( "some-node" ) ; let rectObserver = observeRect ( node , rect => { console . log ( "left" , rect . left ) ; console . log ( "top" , rect . top ) ; console . log ( "height" , rect . height ) ; console . log ( "width" , rect