关于前端:徒手写一个简单的步骤线

第一种：

template

<div class="per-mobile-step"
          v-for="(item,index) in steps"
          :key="item.value"
          @click="changeStep(item,index)"
          :class="['per-mobile-step-'+index,
            item.value==currentcomponent?'active':'',
            index < currentcomponentindex?'active':'']">
            <div class="title-dot">
              <i :class="[
                  item.value==currentcomponent?'active':'',
                  index < currentcomponentindex?'actived':'']"></i>
              <div class="line" 
                :class="[index < currentcomponentindex?'active':'']" 
                v-if="index!==3"></div>
            </div>
            <div class="title-text"
            :class="['title-text-'+index,
              item.value==currentcomponent?'active':'',
              index < currentcomponentindex?'active':'']">{{item.label}}</div>
          </div>

下面的

index < currentcomponentindex?'active':''

为了记录以后步骤前的已实现的步骤，actived 为已实现，active 为以后展现步骤

js

data(){
    return{
      currentcomponent:"ac1",
      currentcomponentindex:0,
      steps:[
        {
          label:"身份验证",
          value:"ac1"
        },
        {
          label:"手机号绑定",
          value:"ac2"
        },
        {
          label:"设置明码",
          value:"ac3"
        },
        {
          label:"实现",
          value:"ac4"
        },
      ]
    }
  },

scss

// mobile
  .per-mobile-step{
    flex: 3;
    font-size: 0.8rem;
    line-height: 2;
    color: #e2e2e2;
    &.per-mobile-step-3{flex: 1;// 最初一步没有线条，做了 flex 比例缩减}
    .title-dot{
      display: flex;
      align-items: center;
      >i{
        height: 10px;
        width: 10px;
        background: #e6e6e6;
        display: block;
        border-radius: 50%;
        &.active{
          background: #f39800;
          box-shadow: 0 0 0 3px #887963;
        }
        &.actived{
          background: #f39800;
          box-shadow: 0 0 0 3px #f39800;
        }
      }
      .line{
        flex: 1;
        height: 1px;
        background: #e6e6e6;
        &.active{background: #f39800;}
      }
    }
// 为了文字居中，包裹层向左边挪动 20px
// 字居中用 relative 做了偏移，有更好的办法代码请甩给我~
    .title-text{
      position: relative;
      margin-top: 5px;
      &.active{color: #edc462;}
    }
    .title-text-0{left: -20px;}
    .title-text-1{left: -23px;}
    .title-text-2{left: -20px;}
    .title-text-3{left: -10px;}
    
  }

第二种：

template

<div class="per-step"
          v-for="(item,index) in steps"
          :key="item.value"
          @click="changeStep(item,index)"
          :class="[
            index!==0?'before-trangle':'',
            index!==3?'after-trangle':'','per-step-'+index,
            item.value==currentcomponent?'active':'',
            index < currentcomponentindex?'active':'']">
            <span>{{item.label}}</span>
          </div>

scss

.per-step{
    flex: 1;
    text-align: center;
    background: rgba(0,0,0,.5);
    padding: 10px 0;
    margin: 0 20px;
    color: #fff;
    position: relative;
    height: 40px;
    cursor: pointer;
    &.active{background: rgba(0,84,165,.5);
    }
    &.before-trangle{
      margin-left: 40px;
      &::before{
        content: " ";
        width: 0px;
        height: 0px;
        position: absolute;
        top: 0;
        left: -40px;
        border: 20px solid rgba(0,0,0,.5);
        border-left-color: transparent;
      }
      &.active{
        &::before{border: 20px solid rgba(0,84,165,.5);
          border-left-color: transparent;
        }
      }
    }
    &.after-trangle{
      &::after{
        content: " ";
        width: 0px;
        height: 0px;
        position: absolute;
        top: 0;
        right: -40px;
        border: 20px solid transparent;
        border-left-color: rgba(0,0,0,.5);
      }
      &.active{
        &::after{
          border: 20px solid transparent;
          border-left-color: rgba(0,84,165,.5);
        }
      }
    }
    &.per-step-0{margin-left: 0;}
    &.per-step-3{margin-right: 0;}
  }