nested swiper

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.0/js/swiper.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.0/css/swiper.min.css">
<div class="swiper-container" id="outer">
        <div class="swiper-wrapper">
            <div class="swiper-slide">Slide 1</div>
            <div class="swiper-slide">Slide 2</div>
            <div class="swiper-slide"> <div class="swiper-container" id="inner">
        <div class="swiper-wrapper">
            <div class="swiper-slide">Slide 1</div>
            <div class="swiper-slide">Slide 2</div>
            <div class="swiper-slide">Slide 3</div>
            <div class="swiper-slide">Slide 4</div>
            <div class="swiper-slide">Slide 5</div>
            <div class="swiper-slide">Slide 6</div>
            <div class="swiper-slide">Slide 7</div>
            <div class="swiper-slide">Slide 8</div>
            <div class="swiper-slide">Slide 9</div>
            <div class="swiper-slide">Slide 10</div>
        </div>
        <!-- Add Pagination -->
        <div class="swiper-pagination" id="inner1"></div>
    </div></div>
            <div class="swiper-slide">Slide 4</div>
            <div class="swiper-slide">Slide 5</div>
            <div class="swiper-slide">Slide 6</div>
            <div class="swiper-slide">Slide 7</div>
            <div class="swiper-slide">Slide 8</div>
            <div class="swiper-slide">Slide 9</div>
            <div class="swiper-slide">Slide 10</div>
        </div>
        <!-- Add Pagination -->
        <div class="swiper-pagination" id="outer1"></div>
    </div>

CSS

body {
        background: #eee;
        font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
        font-size: 14px;
        color:#000;
        margin: 0;
        padding: 0;
    }
    .swiper-container {
        width: 100%;
        height: 300px;
        margin: 20px auto;
    }
    .swiper-slide {
        text-align: center;
        font-size: 18px;
        background: #fff;
        width: 60%;

        /* 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-slide:nth-child(2n) {
        width: 40%;
    }
    .swiper-slide:nth-child(3n) {
        width: 20%;
    }

    #inner .swiper-slide{
        width:200px;
        height:200px;
        border:1px solid red;
    }

JavaScript

var swiper = new Swiper('#outer', {
        pagination: '#outer1',
        slidesPerView: 4,
        centeredSlides: true,
        paginationClickable: true,
        spaceBetween: 30
    });
     var swiper = new Swiper('#inner', {
        pagination: '#inner1',
        slidesPerView: 1,
        centeredSlides: true,
        paginationClickable: true,
        spaceBetween: 30,
        nested:true,
        touchReleaseOnEdges: true
    });