2023.12.4今天我学习了如何使用element的时间线组件，效果如：

代码如下：（关键代码 v-if="item.send_type"）判断左右分布情况。因为如果没有这个判断的话，其实会两边都有显示。可以用一个判断表示0显示收信人，1显示发信人。

<template>
            <div class="h-100 p-r" id="scroll-container">
            <!--            <span style="color: gray">历史消息：</span>-->
            <div class="timelineBox">
              <el-timeline>
                <el-timeline-item v-for="(item, index) in history_data" :key="index" :color="item.color">
                  <div v-if="item.send_type==2" class="evenDiv">
                    <div class="timelinItemBox0">
                      <div class="timelinItemBox-top f-r a-c" style="background-color:#21A0AD">
                        <span>{{ item.name }}</span>
                      </div>
                      <div class="timelinItemBox-bottom">
                        <div>
                          <span style="letter-spacing: 2px">{{ item.content }}</span>
                        </div>
                        <span style="float: left;color: gray;margin-top: 1%">{{ item.created_time }}</span>

                      </div>

                    </div>
                    <div class="timelinItemBox1">
                      <div class="timelinItemBox-top f-r a-c" style="color: transparent">
                        <div>发送时间：{{ item.created_time }}</div>
                        <div class="m-l20">姓名：{{ item.name }}</div>
                      </div>
                      <div class="timelinItemBox-bottom">
                        <span style="color: transparent">信息：{{ item.content }}</span>
                      </div>
                    </div>
                  </div>

                  <div v-else class="unevenDiv">
                    <div class="timelinItemBox0">
                      <div class="timelinItemBox-top f-r a-c">
                        <div class="m-l20" style="color: transparent">姓名：{{ item.name }}</div>
                      </div>
                      <div class="timelinItemBox-bottom">
                        <span style="color: transparent">信息：{{ item.content }}</span>
                      </div>

                    </div>
                    <div class="timelinItemBox1">
                      <div class="timelinItemBox-top f-r a-c" style="background-color:#507CBE">
                        <div class="m-l20">{{ item.name }}</div>
                      </div>
                      <div class="timelinItemBox-bottom">
                        <span style="letter-spacing: 2px">{{ item.content }}</span>
                      </div>
                      <span :style="item.read==0?{color:'red',float: 'left'}:{color:'green',float: 'left'}"
                      >{{ item.read == '0' ? '未读' : '已读' }}</span>
                      <span style="float: right;color: gray;margin-top: 1%">{{ item.created_time }}</span>
                    </div>
                  </div>
                </el-timeline-item>
              </el-timeline>
            </div>
          </div>
</template>
<script>
export default{
  data(){
    return:{
       history_data:[
    {name:'张三',send_type:1,content:'发送1',read:1,create_time:'2023-12-04'},
    {name:'李四',send_type:2,content:'接收1',read:1,create_time:'2023-12-04'},
    {name:'张三',send_type:1,content:'发送2',read:1,create_time:'2023-12-04'},
    {name:'李四',send_type:2,content:'接收2',read:0,create_time:'2023-12-04'},
]
     }
   },
   created(){
     this.getList()
   },
   methods:{
     getList(){
        //设置这个可以自动将滚轮滑倒最底下
        this.$nextTick(() => {
          let scrollContainer = document.getElementById('scroll-container')
          scrollContainer.scrollTop = scrollContainer.scrollHeight
        })
     }
   }
 }
</script>
<style>
.h-100 {
  height: 50vh;
  border-right: 1px solid #bdbdbd;
  border-left: 1px solid #bdbdbd;
  border-top: 1px solid #bdbdbd;
  overflow-y: scroll;
}

.p-r {
  position: relative;
}

.f-r {
  flex-direction: row;
}

.a-c {
  align-content: center;
  align-items: center;
}

.m-l20 {
}

.timelineBox {
  position: absolute;
  left: 45%;
  width: 45%;

  .el-timeline-item {
  }

}

.timelinItemBox0 {
  width: calc(100%);
  height: calc(100%);
  position: absolute;
  right: calc(100% + 18px);
  border: 1px solid #dedede;
  border-radius: 5px;
}

.timelinItemBox1 {
  height: calc(100%);
  width: calc(100%);
  margin-left: 28px;
  border: 1px solid #dedede;
  border-radius: 5px;
}

.timelinItemBox-top {
  height: 25px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 2px;
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
  color: #ffffff;
}

.timelinItemBox-bottom {
  color: #606266;
  height: 100%;
  //letter-spacing: 2px;
  white-space: pre-line;
  padding: 5px;
}

.evenDiv {

  .timelinItemBox1 {
    border: none;
    -moz-user-select: none;
    -khtml-user-select: none;
    user-select: none;

    .timelinItemBox-bottom {
      color: transparent;
    }

  }
}

.unevenDiv {

  .timelinItemBox0 {
    border: none;
    -moz-user-select: none;
    -khtml-user-select: none;
    user-select: none;

    .timelinItemBox-bottom {
      color: transparent;
    }

  }
}

</style>

转载：改写elemen时间线组件，让其左右分布显示_时间线 组件-CSDN博客