<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item,index) in levelList" v-if="item.meta.title" :key="item.path">
        <span v-if="item.redirect==='noredirect'||index===levelList.length-2" class="no-redirect">{{
          item.meta.title
        }}</span>
        <router-link v-else :to="item.redirect||item.path" style="color: white">{{ item.meta.title }}</router-link>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
export default {
  data() {
    return {
      levelList: null
    }
  },
  watch: {
    $route() {
      this.getBreadcrumb()
    }
  },
  created() {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb() {
      let matched = this.$route.matched.filter(item => item.name)
      const first = matched[0]
      if (first && first.name !== 'dashboard') {
        matched = [{ path: '/dashboard', meta: { title: '首页' }}].concat(matched)
      }
      this.levelList = matched
    }
  }
}
</script>

<style lang="scss" rel="stylesheet/scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 13px;
  line-height: 50px;
  color: #fff;
  margin-left: 0;

  .no-redirect {
    color: white;
    cursor: text;
  }
}

::v-deep .el-breadcrumb__separator {
  margin: 0 12px;
}
</style>
