js监听鼠标滚动事件

window.onmousewheel=document.onmousewheel=(e)=>{
    if(e.wheelDelta<0){
        console.log("鼠标滚轮后滚")
    }else if(e.wheelDelta>0){
        console.log("鼠标滚轮前滚")
    } 
}