把代码加到样式文件中：
#app {
.main-container {
min-height:100%;
transition:margin-left .28s;
margin-left:$sideBarWidth;
position:relative;
}
.sidebar-container {
transition:width 0.28s;
width:$sideBarWidth !important;
background-color:$menuBg;
height:100%;
position:fixed;
font-size:0px;
top:0;
bottom:0;
left:0;
z-index:1001;
overflow:hidden;
// reset element-ui css
.horizontal-collapse-transition {
transition:0s width ease-in-out, 0s padding-left ease-in-out, 0s padding-right ease-in-out;
}
.scrollbar-wrapper {
overflow-x:hidden !important;
}
.el-scrollbar__bar.is-vertical {
right:0px;
}
.el-scrollbar {
height:100%;
}
&.has-logo {
.el-scrollbar {
height:calc(100% -50px);
}
}
.is-horizontal {
display:none;
}
a {
display:inline-block;
width:100%;
overflow:hidden;
}
.svg-icon {
margin-right:16px;
}
.sub-el-icon {
margin-right:12px;
margin-left: -2px;
}
.el-menu {
border:none;
height:100%;
width:100%!important;
}
// menu hover
.submenu-title-noDropdown,
.el-submenu__title {
&:hover {
background-color:$menuHover !important;
}
}
.is-active>.el-submenu__title {
color:$subMenuActiveText !important;
}
& .nest-menu .el-submenu>.el-submenu__title,
& .el-submenu .el-menu-item {
min-width:$sideBarWidth !important;
background-color:$subMenuBg !important;
&:hover {
background-color:$subMenuHover !important;
}
}
}
.hideSidebar {
.sidebar-container {
width:54px !important;
}
.main-container {
margin-left:54px;
}
.submenu-title-noDropdown {
padding:0 !important;
position:relative;
.el-tooltip {
padding:0 !important;
.svg-icon {
margin-left:20px;
}
.sub-el-icon {
margin-left:19px;
}
}
}
.el-submenu {
overflow:hidden;
&>.el-submenu__title {
padding:0 !important;
.svg-icon {
margin-left:20px;
}
.sub-el-icon {
margin-left:19px;
}
.el-submenu__icon-arrow {
display:none;
}
}
}
.el-menu--collapse {
.el-submenu {
&>.el-submenu__title {
&>span {
height:0;
width:0;
overflow:hidden;
visibility:hidden;
display:inline-block;
}
}
}
}
}
.el-menu--collapse .el-menu .el-submenu {
min-width:$sideBarWidth !important;
}
// mobile responsive
.mobile {
.main-container {
margin-left:0px;
}
.sidebar-container {
transition:transform .28s;
width:$sideBarWidth !important;
}
&.hideSidebar {
.sidebar-container {
pointer-events:none;
transition-duration:0.3s;
transform:translate3d(-$sideBarWidth, 0, 0);
}
}
}
.withoutAnimation {
.main-container,
.sidebar-container {
transition:none;
}
}
}
// when menu collapsed
.el-menu--vertical {
&>.el-menu {
.svg-icon {
margin-right:16px;
}
.sub-el-icon {
margin-right:12px;
margin-left: -2px;
}
}
.nest-menu .el-submenu>.el-submenu__title,
.el-menu-item {
&:hover {
// you can use $subMenuHover
background-color:$menuHover !important;
}
}
// the scroll bar appears when the subMenu is too long
>.el-menu--popup {
max-height:100vh;
overflow-y:auto;
&::-webkit-scrollbar-track-piece {
background:#d3dce6;
}
&::-webkit-scrollbar {
width:6px;
}
&::-webkit-scrollbar-thumb {
background:#99a9bf;
border-radius:20px;
}
}
}
