swiper4-vue 不使用loop,由最后一张跳到第一张

<template>
    <div class="swiper-box">
        <div class="swiper-container">
            <div class="swiper-wrapper">
                <div class="swiper-slide" v-for="(item, index)  in slides" :key="index">
                    <img :src="item" :data-index="index">
                </div>
            </div>
        </div>
        <div class="swiper-add" >
    .swiper-box {
        position: relative;
        width: 408px;
        height: 248px;
        background: url('../../assets/left/bg.png') no-repeat;
        background-size: 100% auto;
    }
    .swiper-container {
        width: 300px;
        margin-left: 50px;
    }
    .swiper-slide {
        text-align: center;
        /* Center slide text vertically */
        display: -webkit-box;
        display: -ms-flexbox;
        display: -webkit-flex;
        display: flex;
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        -webkit-justify-content: center;
        justify-content: center;
        -webkit-box-align: center;
        -ms-flex-align: center;
        -webkit-align-items: center;
        align-items: center;
    }
    .swiper-add {
        position: absolute;
        right: 12px;
        top: 82px;
    }
    .swiper-add img {
        width: 40px;
        height: 42px;
    }

    .swiper-text {
        color: #ffffff;
        text-align: center;
        line-height:32px;
        position: absolute;
        left: 50%;
        top: 78%;
        transform: translate(-50%, -50%);
        -webkit-transform: translate(-50%, -50%);
    }
    .swiper-text div:last-child {
        color: #43FFD2;
        font-size: 18px;
        vertical-align: middle;
    }
    .swiper-text span:first-child {
        display: inline-block;
        width: 23px;
        height: 26px;
        margin: 0 4px 0 12px;
        vertical-align: middle;
        background: url('../../assets/left/level.png') no-repeat;
        background-size: 100% auto;
    }
    .swiper-text span:last-child {
        font-size: 12px;
        vertical-align: middle;
    }
    .swiper-wrapper {
        padding-top: 44px;
        height: 110px;
    }

    .swiper-slide img {
        width: 80px;
        height: 80px;
    }
    .swiper-slide-active img {
        width: 110px;
        height: 110px;
    }

</style>