vue beforeRouteLeave记住路由位置

beforeRouteLeave(to,from,next){
///关键语句
  let top= document.documentElement.scrollTop || document.body.scrollTop || window.pageYOffset;
  this.rememberOffsetTop =top|| 0
  next();
},

activated(){
this.$nextTick(()=>{
document.documentElement.scrollTop = Number(this.rememberOffsetTop);
})
}