@substrate-system/image/example/public/assets/index-DpU9gUnP.css

An image component

.placeholder {
    display: inline-block;
    min-width: 50px;
    min-height: 50px;
    background-color: #f6f6f6;
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
} 

.placeholder img {
    position: absolute; 
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

img.sharp {
    opacity: 0;
}

img.sharp.loaded {
    opacity: 1;
    animation: sharpen 0.6s both;
}

.blurry {
    filter: blur(30px);
}

@keyframes sharpen {
    from {
        filter: blur(30px);
    }
    to {
        filter: blur(0px)
    }
}
.placeholder, .non-blurry-wrapper, .image {
    display: inline-block;
    height: 50vw;
    width: 50vw;
}

:is(.non-blurry-wrapper,.image) img {
        object-fit: cover;
        width: 100%;
        height: 100%;
    }

:is(.blur-test,.non-blurry-image,.image) img {
        object-fit: cover;
    }