Vue sample code for implementing two-column horizontal timeline

<template>
    <ul class="timelineHengBox">
        <li class="timelineHengItem" v-for="(item,index) in timelineList" :key="index" 
            :style="{left: index % 2 != 0 ? (liHalf*index)+52+'px':0,'border-right': index == timelineList.length - 2 ?'1px solid #FEFEFE' : 'none'}">
            <div class="timeline_dot" :style="{top: index % 2 != 0 ? '-5px' : '93px'}"></div>
            <div class="timeline_dot" v-show="index == timelineList.length - 2" style="right: -6px;top:93px;left: unset;"></div>
            <div class="timeline_wapper flex" :class="{'mt20': ​​index % 2 != 0}">
                <img src="../../static/img/excelIcon.png" class="bjIcon" :style="{'margin': index % 2 != 0 ? '11px 44px 0 42px' :''}">
                <div>{{item.content}}</div>
            </div>
            <div class="timelineDate_bottom" :style="{'top': index % 2 != 0 ? '-20px' : '103px'}">{{item.dateTime}}</div>
        </li>
    </ul>
</template>

<script>
    export default {
        name: 'timelineH',
        props: {
            timelineList: {
                type: Array,
                default: []
            }
        },
        data () {
            return {
                liWidth: 496, //The width of the entire li, to be consistent with the style of the li below liHalf: 248, //This is half the width of the li, so that the point on the middle horizontal line can find the correct position}
        }
    }
</script>
<style scoped>
    .timelineHengBox {
        color: #fff;
        margin: 0;
        padding: 0 26px;
        width: 92%;
        padding-top: 18px;
        padding-bottom: 10px;
        margin-left: 26px;
        height: 87px;
        border-bottom: 3px solid #FEFEFE;
    }
    .timelineHengItem {
        list-style: none;
        height: 97px;
        width: 496px;
        border-left: 1px solid #FEFEFE;
        float: left;
        border-bottom: 3px solid #FEFEFE;
        position: relative;
    }
    .timelineHengItem:nth-child(2n) {
        position: absolute;
        left: 248px;
        border-bottom: 0;
        top: 115px;
    }
    .timeline_dot {
        width: 10px;
        height: 11px;
        background: #FEFEFE;
        position: absolute;
        left: -5px;
        top: 93px;
    }
    .timeline_dot:nth-child(2n) {
        top: -7px;
    }
    .timeline_wapper {
        width: 400px;
        text-align: left;
        font-size: 12px;
        color: #FFFFFF;
        line-height: 20px;
    }
    .mt20 {
        margin-top: 20px;
    }
    .bjIcon {
        width: 32px;
        height: 32px;
        margin: 31px 44px 0 42px;
    }
    .timelineDate_bottom {
        width: 80px;
        height: 20px;
        position: absolute;
        top: 103px;
        left: -60px;
        text-align: left;
        font-size: 14px;
        font-weight: bold;
        color: #FFBA00;
        margin-left: 77px;
    }
</style>

<div class="timelineHengContainer">
     <timelineH :timelineList='timelineList' />
</div>

import timelineH from "@/components/timelineH.vue";
components:
        timelineH
},

data() {
    return {
          timelineList: [

                {
                    dateTime: '2021-09',
                    content: 'Welcome to mining, mine every day and get ore, hahahaha, welcome to mining, mine every day and get ore, hahahaha, welcome to mining, mine every day and get ore, hahahaha, welcome to mining, mine every day and get ore, hahahaha. '
                },{
                    dateTime: '2021-10',
                    content: 'Please keep warm in winter, it's too cold.Please keep warm in winter, it's too cold.Please keep warm in winter, it's too cold.Please keep warm in winter, it's too cold. '
                },{
                    dateTime: '2021-11',
                    content: 'The thirty-day post challenge has officially begun. I want a projector. I've always wanted to buy one. '
                },{
                    dateTime: '2021-12',
                    content: 'It's almost the end of the month, a new year begins, happy new year, a new year begins, happy new year, a new year begins, happy new year. '
                }
            ]
    }
}

.timelineHengContainer {
        width: 100%;
        height: 227px;
        background-image: url('../../static/img/timelineBg.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
}