.wrapper{
    min-height: 100vh;
    position: relative;/*←相対位置*/
    padding-bottom: 120px;/*←footerの高さ*/
    box-sizing: border-box;/*←全て含めてmin-height:100vhに*/
}
#loading{
    position: absolute;
    left: 50%;
    top: 30%;
}
#loader-wrap {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    background: rgb(94, 94, 94);
    opacity:0.9;
    z-index: 10;
}
#data_view {
    padding: 30px;
}