CSS 隐藏滚动条

.el-menu-container {
  height: calc(100% - 60px);
  scrollbar-width: none; /* firefox */
  -ms-overflow-style: none; /* ie10+ */
  overflow-x: hidden;
  overflow-y: auto;
  background: #304156;
}
.el-menu-container::-webkit-scrollbar { /* chrome */
  display: none;
}