使用React js检测用户何时滚动到div的底部

您可以

el.getBoundingClientRect().bottom

isBottom(el) {  return el.getBoundingClientRect().bottom <= window.innerHeight;}componentDidMount() {  document.addEventListener('scroll', this.trackScrolling);}componentWillUnmount() {  document.removeEventListener('scroll', this.trackScrolling);}trackScrolling = () => {  const wrappedElement = document.getElementById('header');  if (this.isBottom(wrappedElement)) {    console.log('header bottom reached');    document.removeEventListener('scroll', this.trackScrolling);  }};