怎么实现两个滚动条，当内部滚动条滚动到底部时外部滚动条立刻向下滚动？-灵析社区

一个简单的方案: let outer_scroll = document.querySelector("#outer_scroll"); let inner_scroll = document.querySelector("#inner_scroll"); inner_scroll.addEventListener( "mousewheel", (e) => { let ct = e.currentTarget; if (e.wheelDeltaY > 0) { // 上滚 if(ct.scrollTop == 0){ outer_scroll.scrollTop -= 30; e.preventDefault(); e.stopPropagation(); } } else { if (ct.scrollTop + ct.offsetHeight == ct.scrollHeight) { outer_scroll.scrollTop += 30; e.preventDefault(); e.stopPropagation(); } } }, false );