语言：vue
一、根据计算长度控制样式变化

1. 样式如下：
   
   2.代码:根据长度百分比计算样式

<template>
  <!-- 步骤条盒子 -->
  <div class="steps-box">
    <!-- 步骤条 -->
    <div
      class="Article-steps"
      :class="data.stepList.length <= activeIndex ? 'step-over' : ''"
    >
      <!-- 步骤条背景进度条 -->
      <div class="line">
        <span
          class="plan"
          :style="`width:${
      
            (activeIndex - 1) * (100 / (data.stepList.length - 1))
          }%`"
        ></span>
      </div>
      <!-- 每步部分 -->
      <span
        class="step"
        v-for="(i, index) in data.stepList"
        :key="index"
        :class="
          activeIndex == i.stepIndex || i.stepIndex <= activeIndex
            ? 'step-active'
            : 'step-start'
        "
      >
        <span
          class="step-num"
          :class="{ active: activeIndex + 1 === i.stepIndex }"
        >
          <span
            class="num"
            :class="{ active: activeIndex + 1 === i.stepIndex }"
            >{
    {
     i.stepIndex }}</span
          >
        </span>
        <p class="title" :class="{ active: activeIndex + 1 === i.stepIndex }">
          {
    {
     i.title }}
        </p>
      </span>
    </div>
  </div>
</template>
<script>
import {
     reactive, ref } from "vue";

export default {
    
  setup() {
    
    const activeIndex = ref(3);
    const data = reactive({
    
      //步骤条步数
      stepList: [
        {
    
          stepIndex: 1,
          title: "新录入",
        },
        {
    
          stepIndex: 2,
          title: "带看中",
        },
        {
    
          stepIndex: 3,
          title: "已反馈",
        },
        {
    
          stepIndex: 4,
          title: "意向中",
        },
        {
    
          stepIndex: 5,
          title: "已成交",
        },
      ],
    });

    return {
     data, activeIndex };
  },
};
</script>
<style lang="less" scoped>
.steps-box {
    
  user-select: none;
  width: 100%;
  height: 98px;
  position: relative;
  background: #f8faff;
  // <!-- 步骤条背景进度条 -->
  .line {
    
    margin: 0px auto;
    position: absolute;
    left: 1%;
    top: 9px;
    background: rgb(204, 204, 204);
    width: 97%;
    height: 2px;
    overflow: hidden;
    flex-direction: row;
    .plan {
    
      position: absolute;
      top: 0;
      left: 0;
      height: 2px;
      transition: 0.5s;
      background: #8ab4f3;
    }
  }
  .Article-steps {
    
    display: flex;
    justify-content: space-between;
    .step {
    
      display: flex;
      flex-direction: column;
      align-items: center;
      .title {
    
        font-size: 17px;
        font-weight: bold;
        color: #808080;
        margin-top: 15px;
        &.active {
    
          color: #333 !important;
        }
      }
      .step-num {
    
        width: 20px;
        height: 20px;
        border-radius: 12px;
        display: inline-block;
        line-height: 20px;
        text-align: center;
        border: 2px solid;
        color: #808080;
        font-weight: bold;
        &.active {
    
          color: #333 !important;
          transform: rotate(90deg);
          background: #f8faff;
        }
        .num {
    
          display: inline-block;
          &.active {
    
            transform: rotate(-90deg);
          }
        }
      }
    }
  }
  //当前所在位置样式
  .step-active {
    
    .step-num {
    
      color: #2d7df5 !important;
      transform: rotate(90deg);
      background: #f8faff;
      .num {
    
        transform: rotate(-90deg);
      }
    }
    .title {
    
      color: #2d7df5 !important;
    }
  }
  .step-start {
    
    .step-num {
    
      color: #808080 !important;
      transform: rotate(0deg);
      background: #f8faff;
    }
  }
}
</style>

二、模仿element框架的步骤条写法

1. 样式如下：
   
2. 代码：

<template>
  <div style="background-color: white; padding: 20px">
    <div class="steps">
      <div class="step" v-for="(i, index) in stepList" :key="index">
        <div
          class="step-head"
          :class="
            activevalue == i.stepIndex || i.stepIndex <= activevalue
              ? 'step-finish'
              : 'step-wait'
          "
        >
          <div
            class="step-line"
            :class="
              activevalue == i.stepIndex + 1 || i.stepIndex + 1 <= activevalue
                ? 'step-finish'
                : 'step-wait'
            "
          >
            <i class="step-line-inner"></i>
          </div>
          <div
            class="step-icon"
            :class="{ active: activevalue + 1 === i.stepIndex }"
          >
            <div class="step-icon-text">{
    {
     i.stepIndex }}</div>
          </div>
        </div>
        <div
          class="step-main"
          :class="
            activevalue == i.stepIndex || i.stepIndex <= activevalue
              ? 'step-finish'
              : 'step-wait'
          "
        >
          <div
            class="step-title"
            :class="{ active: activevalue + 1 === i.stepIndex }"
          >
            {
    {
     i.title }}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import {
     ref } from "vue";

export default {
    
  props: {
    
    activevalue: String, //父组件传过来的数据
  },
  setup() {
    
    // const activevalue = ref(3);
    const stepList = ref();
    //步骤条步数
    stepList.value = [
      {
    
        stepIndex: 1,
        title: "新录入",
      },
      {
    
        stepIndex: 2,
        title: "带看中",
      },
      {
    
        stepIndex: 3,
        title: "已反馈",
      },
      {
    
        stepIndex: 4,
        title: "已成交",
      },
    ];

    return {
     stepList };
  },
};
</script>
<style lang="less" scoped>
.steps {
    
  display: flex;
  text-align: center;
  .step {
    
    flex-basis: 25%;
    margin-right: 0px;
    .step-head {
    
      position: relative;
      width: 100%;
      .step-line {
    
        left: 50%;
        right: -50%;
        height: 0.1px;
        top: 11px;
        position: absolute;
        border: 1px solid;
        border-color: inherit;
        background-color: #c0c4cc;

        .step-line-inner {
    
          transition-delay: 0ms;
          border-width: 1px;
          width: 100%;
          display: block;
          border: 1px solid;
          border-color: inherit;
          transition: 0.15s ease-out;
          box-sizing: border-box;
          width: 0;
          height: 0;
        }
      }

      .step-icon {
    
        position: relative;
        z-index: 1;
        display: inline-flex;
        justify-content: center;
        align-items: center;
        width: 24px;
        height: 24px;
        font-size: 14px;
        box-sizing: border-box;
        background: #fff;
        transition: 0.15s ease-out;
        border-radius: 50%;
        border: 2px solid;
        border-color: inherit;
        &.active {
    
          color: #333 !important;
        }
        .step-icon-text {
    
          display: inline-block;
          user-select: none;
          text-align: center;
          font-weight: 700;
          line-height: 1;
          color: inherit;
        }
      }
    }
    .step-main {
    
      .step-title {
    
        font-size: 14px;
        line-height: 38px;
        font-weight: 700;
        text-align: center;
        &.active {
    
          color: #333 !important;
        }
      }
    }
  }
  .step:last-of-type .step-line {
    
    display: none;
  }

  //当前所在位置样式
  .step-finish {
    
    color: #2d7df5;
  }
  .step-wait {
    
    color: #808080;
  }
}
</style>