on-transition-end:跨浏览器过渡事件监听器

在过渡端 跨浏览器transtionend事件监听器： import onTransitionEnd from 'on-transition-end' ; // or const onTransitionEnd = window . onTransitionEnd ; const element = document . getElementById ( 'transitioning-element' ) ; const expectedDuration = 1000 ; // callback: onTransitionEnd ( element , expectedDuration , ( ) => console . log ( 'done' ) ) ; // promise: onTransitionEnd ( element , expectedDuration ) .