Mask an element (such as a button) with a spinner and disable pointer events

spinner-facade.css

/* The only requirement is that your element isn't statically positioned */
.loading {
    position: relative;
    pointer-events: none;
}
.loading:before {
    content: " ";
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" class="spinning-loader" height="20" width="20" style="display: block;"><rect x="0" y="0" width="100" height="100" fill="none" class="bk"></rect><defs><filter id="uil-ring-shadow" x="-100%" y="-100%" width="300%" height="300%"><feOffset result="offOut" in="SourceGraphic" dx="0" dy="0"></feOffset><feGaussianBlur result="blurOut" in="offOut" stdDeviation="0"></feGaussianBlur><feBlend in="SourceGraphic" in2="blurOut" mode="normal"></feBlend></filter></defs><path fill="#fff"  d="M10,50c0,0,0,0.5,0.1,1.4c0,0.5,0.1,1,0.2,1.7c0,0.3,0.1,0.7,0.1,1.1c0.1,0.4,0.1,0.8,0.2,1.2c0.2,0.8,0.3,1.8,0.5,2.8 c0.3,1,0.6,2.1,0.9,3.2c0.3,1.1,0.9,2.3,1.4,3.5c0.5,1.2,1.2,2.4,1.8,3.7c0.3,0.6,0.8,1.2,1.2,1.9c0.4,0.6,0.8,1.3,1.3,1.9 c1,1.2,1.9,2.6,3.1,3.7c2.2,2.5,5,4.7,7.9,6.7c3,2,6.5,3.4,10.1,4.6c3.6,1.1,7.5,1.5,11.2,1.6c4-0.1,7.7-0.6,11.3-1.6 c3.6-1.2,7-2.6,10-4.6c3-2,5.8-4.2,7.9-6.7c1.2-1.2,2.1-2.5,3.1-3.7c0.5-0.6,0.9-1.3,1.3-1.9c0.4-0.6,0.8-1.3,1.2-1.9 c0.6-1.3,1.3-2.5,1.8-3.7c0.5-1.2,1-2.4,1.4-3.5c0.3-1.1,0.6-2.2,0.9-3.2c0.2-1,0.4-1.9,0.5-2.8c0.1-0.4,0.1-0.8,0.2-1.2 c0-0.4,0.1-0.7,0.1-1.1c0.1-0.7,0.1-1.2,0.2-1.7C90,50.5,90,50,90,50s0,0.5,0,1.4c0,0.5,0,1,0,1.7c0,0.3,0,0.7,0,1.1 c0,0.4-0.1,0.8-0.1,1.2c-0.1,0.9-0.2,1.8-0.4,2.8c-0.2,1-0.5,2.1-0.7,3.3c-0.3,1.2-0.8,2.4-1.2,3.7c-0.2,0.7-0.5,1.3-0.8,1.9 c-0.3,0.7-0.6,1.3-0.9,2c-0.3,0.7-0.7,1.3-1.1,2c-0.4,0.7-0.7,1.4-1.2,2c-1,1.3-1.9,2.7-3.1,4c-2.2,2.7-5,5-8.1,7.1 c-0.8,0.5-1.6,1-2.4,1.5c-0.8,0.5-1.7,0.9-2.6,1.3L66,87.7l-1.4,0.5c-0.9,0.3-1.8,0.7-2.8,1c-3.8,1.1-7.9,1.7-11.8,1.8L47,90.8 c-1,0-2-0.2-3-0.3l-1.5-0.2l-0.7-0.1L41.1,90c-1-0.3-1.9-0.5-2.9-0.7c-0.9-0.3-1.9-0.7-2.8-1L34,87.7l-1.3-0.6 c-0.9-0.4-1.8-0.8-2.6-1.3c-0.8-0.5-1.6-1-2.4-1.5c-3.1-2.1-5.9-4.5-8.1-7.1c-1.2-1.2-2.1-2.7-3.1-4c-0.5-0.6-0.8-1.4-1.2-2 c-0.4-0.7-0.8-1.3-1.1-2c-0.3-0.7-0.6-1.3-0.9-2c-0.3-0.7-0.6-1.3-0.8-1.9c-0.4-1.3-0.9-2.5-1.2-3.7c-0.3-1.2-0.5-2.3-0.7-3.3 c-0.2-1-0.3-2-0.4-2.8c-0.1-0.4-0.1-0.8-0.1-1.2c0-0.4,0-0.7,0-1.1c0-0.7,0-1.2,0-1.7C10,50.5,10,50,10,50z" filter="url(#uil-ring-shadow)"><animateTransform attributeName="transform" type="rotate" from="0 50 50" to="360 50 50" repeatCount="indefinite" dur="1s"></animateTransform></path></svg>');
    height: 20px;
    width: 20px;
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
}