vue.js-div怎么隐藏滚动条

mounted () {
 var bop = document.getElementById(this.id);
 if(bop == undefined){
 return;
 }
 var isFirefox=navigator.userAgent.indexOf("Firefox") 
 if(isFirefox>0){ 
 bop.addEventListener('DOMMouseScroll', function(event) { //火狐
 var evt = window.event || arguments[0]
 if (evt.detail <= -3) { 
 bop.scrollTop=bop.scrollTop-10
 } else if (evt.detail >= 3) {
 bop.scrollTop=bop.scrollTop+10
 }
 evt.stopPropagation();
 evt.preventDefault();
 }, false); 
 }else{
 bop.addEventListener("mousewheel",function(event) {
 var evt = window.event || arguments[0]
 evt.returnValue = false //屏蔽body滚动事件 
 if (evt.wheelDelta <= -120) { 
 bop.scrollTop=bop.scrollTop+40
 } else if (evt.wheelDelta >= 120) {
 bop.scrollTop=bop.scrollTop-40
 }
 })
 } 
 }
 }