.jarallax {
    position: relative;
    z-index: 0;
}
.jarallax > .jarallax-img {
    position: absolute;
    object-fit: cover; 
    font-family: 'object-fit: cover;';
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

 .jarallax-img {
    position: absolute;
    object-fit: cover; 
    font-family: 'object-fit: cover;'; 
    z-index: -1; 
    transform: none!important;
    margin: 0!important;
}
.jarallax-keep-img {
    position: relative;
    z-index: 0;
}
.jarallax-keep-img > .jarallax-img {
    position: relative;
    display: block;
    max-width: 100%;
    height: auto;
    z-index: -100;
}
span[data-jarallax-element] {
    display: inline-block;
}


/* demo styles */
*, *:after, *:before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
} 
 
.jarallax {
    min-height: 400px;
}