supply-front/src/components/NavMenu/index.vue

<template>
  <div>
    <el-menu 
      :default-active="activeIndex" 
      class="el-menu-demo" 
      mode="horizontal" 
      @select="handleSelect" 
      :background-color="variables.navbarBg"
      :text-color="variables.navbarText"
      :active-text-color="variables.navbarActiveText">
      <el-menu-item index="1">学员系统</el-menu-item>
    </el-menu>
  </div>
</template>

<script>
import variables from '@/styles/variables.scss'

export default {
  name: 'NavMenu',
  data() {
    return {
      activeIndex: '1',
    }
  },
  computed: {
    variables() {
      return variables
    },
  },
  mounted() {
    
  },
  methods: {
    handleSelect(key, keyPath) {
      console.log(key, keyPath);
    }
  }
}
</script>

<style lang="scss" scoped>
  .el-menu--horizontal {
    >.el-menu-item {
      height: 50px;
      line-height: 50px;
      &.is-active {
        background: #3f62ca !important;
      }
    }
  }
    
</style>