话不多说直接上组件代码。。

<template>
  <div>
    <ul class="steps">
      <li
        v-for="(item,index) in SetData"
        :key="item+index"
        :class="{'active':Steps===index}"
      >{{item+Steps}}</li>
    </ul>
  </div>
</template>
<script lang="ts">
import { Component, Prop, Vue } from "vue-property-decorator";
import axios from "axios";
@Component
export default class Steps extends Vue {
  @Prop({default:0}) private Steps!: number;
  @Prop() private SetData!: string[];
}
</script>

<style>
.steps {
  position: relative;
  margin-bottom: 30px;
  counter-reset: step; /*创建步骤数字计数器*/
}
/*步骤描述*/
.steps li {
  list-style-type: none;
  font-size: 12px;
  text-align: center;
  width: 15%;
  position: relative;
  float: left;
}

/*步骤数字*/
.steps li:before {
  display: block;
  content: counter(step); /*设定计数器内容*/
  counter-increment: step; /*计数器值递增*/
  width: 32px;
  height: 32px;
  background-color: #019875;
  line-height: 32px;
  border-radius: 32px;
  font-size: 16px;
  color: #fff;
  text-align: center;
  font-weight: 700;
  margin: 0 auto 8px auto;
}

/*连接线*/
.steps li ~ li:after {
  content: "";
  width: 100%;
  height: 2px;
  background-color: #019875;
  position: absolute;
  left: -50%;
  top: 15px;
  z-index: -1; /*放置在数字后面*/
}

/*将当前/完成步骤之前的数字及连接线变绿*/
.steps li.active:before,
.steps li.active:after {
  background-color: #019875;
}

/*将当前/完成步骤之后的数字及连接线变灰*/
.steps li.active ~ li:before,
.steps li.active ~ li:after {
  background-color: #777;
}
</style>

调用组件。。。

<template>
  <div>
    {{num1}}
    <el-button type="warning" @click="getNumber">get a random number</el-button>
    <Steps :Steps="registSpets" :SetData="SetData" />
    <el-button type="primary" @click="registSpets++">+++</el-button>
    {{registSpets}}
    <el-button type="danger" @click="registSpets--">---</el-button>
  </div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from "vue-property-decorator";
import Steps from "../components/Steps.vue";
@Component({
  components: {
    Steps
  }
})
export default class Input extends Vue {
  num1: number = 0;
  registSpets = 1;
  SetData = ["用户信息", "魔童哪吒", "齐天大圣", "赤脚大仙", "我爱中国"];
  getNumber() {
    this.num1 = Math.ceil(Math.random() * 10); // Matg.ceil向上取整
  }
}
</script>

效果如下：

参考原文：https://blog.csdn.net/xqq580231/article/details/78086173