element-plus/packages/theme-chalk/src/menu.scss

@import 'mixins/mixins';
@import 'mixins/var';
@import 'mixins/utils';
@import 'common/var';
@import 'common/transition';

@mixin menu-item {
  height: 56px;
  line-height: 56px;
  font-size: var(--el-menu-item-font-size);
  color: var(--el-menu-text-color);
  padding: 0 20px;
  list-style: none;
  cursor: pointer;
  position: relative;
  transition: border-color var(--el-transition-duration),
    background-color var(--el-transition-duration),
    color var(--el-transition-duration);
  box-sizing: border-box;
  white-space: nowrap;

  * {
    vertical-align: middle;
  }

  i {
    color: inherit;
  }

  &:hover,
  &:focus {
    outline: none;
  }

  &:hover {
    background-color: var(--el-menu-hover-background-color);
  }

  @include when(disabled) {
    opacity: 0.25;
    cursor: not-allowed;
    background: none !important;
  }
}

@include b(menu) {
  @include set-component-css-var('menu', $--menu);

  border-right: solid 1px var(--el-menu-border-color);
  list-style: none;
  position: relative;
  margin: 0;
  padding-left: 0;
  background-color: var(--el-menu-background-color);
  box-sizing: border-box;

  @include m(horizontal) {
    display: flex;
    flex-wrap: nowrap;
    border-bottom: solid 1px var(--el-menu-border-color);
    border-right: none;

    & > .#{$namespace}-menu-item {
      display: inline-flex;
      justify-content: center;
      align-items: center;

      height: 60px;
      margin: 0;
      border-bottom: 2px solid transparent;
      color: var(--el-menu-text-color);

      a,
      a:hover {
        color: inherit;
      }

      &:not(.is-disabled):hover,
      &:not(.is-disabled):focus {
        background-color: #fff;
      }
    }
    & > .#{$namespace}-sub-menu {
      &:focus,
      &:hover {
        outline: none;
      }

      &:hover {
        .#{$namespace}-sub-menu__title {
          color: var(--el-menu-hover-text-color);
        }
      }

      &.is-active {
        .#{$namespace}-sub-menu__title {
          border-bottom: 2px solid var(--el-menu-active-color);
          color: var(--el-menu-active-color);
        }
      }

      & .#{$namespace}-sub-menu__title {
        height: 60px;
        line-height: 60px;
        border-bottom: 2px solid transparent;
        color: var(--el-menu-text-color);

        &:hover {
          background-color: #fff;
        }
      }

      & .#{$namespace}-sub-menu__icon-arrow {
        position: static;
        vertical-align: middle;
        margin-left: 8px;
        margin-top: -3px;
      }
    }
    & .#{$namespace}-menu {
      & .#{$namespace}-menu-item,
      & .#{$namespace}-sub-menu__title {
        background-color: var(--el-menu-background-color);
        display: flex;
        align-items: center;
        height: 36px;
        padding: 0 10px;
        color: var(--el-menu-text-color);
      }

      & .#{$namespace}-menu-item.is-active,
      & .#{$namespace}-sub-menu.is-active > .#{$namespace}-sub-menu__title {
        color: var(--el-menu-active-color);
      }
    }
    & .#{$namespace}-menu-item:not(.is-disabled):hover,
    & .#{$namespace}-menu-item:not(.is-disabled):focus {
      outline: none;
      color: var(--el-menu-hover-text-color);
      background-color: var(--el-menu-hover-background-color);
    }
    & > .#{$namespace}-menu-item.is-active {
      border-bottom: 2px solid var(--el-menu-active-color);
      color: var(--el-menu-active-color) !important;
    }
  }
  @include m(collapse) {
    width: 64px;

    > .#{$namespace}-menu-item,
    > .#{$namespace}-sub-menu > .#{$namespace}-sub-menu__title {
      [class^='#{$namespace}-icon-'] {
        margin: 0;
        vertical-align: middle;
        width: 24px;
        text-align: center;
      }

      .#{$namespace}-sub-menu__icon-arrow {
        display: none;
      }

      span {
        height: 0;
        width: 0;
        overflow: hidden;
        visibility: hidden;
        display: inline-block;
      }
    }

    > .#{$namespace}-menu-item.is-active i {
      color: inherit;
    }

    .#{$namespace}-menu .#{$namespace}-sub-menu {
      min-width: 200px;
    }

    .#{$namespace}-sub-menu {
      position: relative;

      & .#{$namespace}-menu {
        position: absolute;
        margin-left: 5px;
        top: 0;
        left: 100%;
        z-index: 10;
        border: 1px solid var(--el-border-color-light);
        border-radius: var(--el-border-radius-small);
        box-shadow: var(--el-box-shadow-light);
      }

      &.is-opened {
        > .#{$namespace}-sub-menu__title .#{$namespace}-sub-menu__icon-arrow {
          transform: none;
        }
      }

      &.is-active i {
        color: inherit;
      }
    }
  }
  @include m(popup) {
    z-index: 100;
    min-width: 200px;
    border: none;
    padding: 5px 0;
    border-radius: var(--el-border-radius-small);
    box-shadow: var(--el-box-shadow-light);
  }
}

@include b(menu-item) {
  @include menu-item;

  & [class^='#{$namespace}-icon-'] {
    margin-right: 5px;
    width: 24px;
    text-align: center;
    font-size: 18px;
    vertical-align: middle;
  }
  @include when(active) {
    color: var(--el-menu-active-color);
    i {
      color: inherit;
    }
  }
}

@include b(sub-menu) {
  list-style: none;
  margin: 0;
  padding-left: 0;

  @include e(title) {
    @include menu-item;

    &:hover {
      background-color: var(--el-menu-hover-background-color);
    }
  }
  & .#{$namespace}-menu {
    border: none;
  }
  & .#{$namespace}-menu-item {
    height: 50px;
    line-height: 50px;
    padding: 0 45px;
    min-width: 200px;
  }
  @include e(hide-arrow) {
    .#{$namespace}-sub-menu__icon-arrow {
      display: none !important;
    }
  }
  @include e(icon-more) {
    margin-right: 0 !important;
  }
  @include e(icon-arrow) {
    position: absolute;
    top: 50%;
    right: 20px;
    margin-top: -7px;
    transition: transform var(--el-transition-duration);
    font-size: 12px;
  }
  @include when(active) {
    .#{$namespace}-sub-menu__title {
      border-bottom-color: var(--el-menu-active-color);
    }
  }
  @include when(opened) {
    > .#{$namespace}-sub-menu__title .#{$namespace}-sub-menu__icon-arrow {
      transform: rotateZ(180deg);
    }
  }
  @include when(disabled) {
    .#{$namespace}-sub-menu__title,
    .#{$namespace}-menu-item {
      opacity: 0.25;
      cursor: not-allowed;
      background: none !important;
    }
  }
  [class^='#{$namespace}-icon-'] {
    vertical-align: middle;
    margin-right: 5px;
    width: 24px;
    text-align: center;
    font-size: 18px;
  }
}

@include b(menu-item-group) {
  > ul {
    padding: 0;
  }
  @include e(title) {
    padding: 7px 0 7px 20px;
    line-height: normal;
    font-size: 12px;
    color: var(--el-text-color-secondary);
  }
}

.horizontal-collapse-transition
  .#{$namespace}-sub-menu__title
  .#{$namespace}-sub-menu__icon-arrow {
  transition: var(--el-transition-duration-fast);
  opacity: 0;
}