项目中需要封装一个steps步骤条，使用v-for与v-if结合来动态控制应该显示的阶段，mark一下便于以后查找记忆

<template>
  <el-steps :active="activeValue" align-center>
    <el-step  v-for="item in caseProcess" v-if="item.key < activeValue"  :key="item.key" :title="stepsName+item.key" :description="item.value"></el-step>
  </el-steps>
</template>  

export default {
    name: "buildTable",
    directives: {
    waves
    },
    data() {
        return {
          activeValue: undefined,
          stepsName: '阶段',
        }
    }
}

值得注意的是v-for使用的时候一定要添加:key='item.key'，否则会报异常warning，component lists rendered with v-for should have explicit keys.