var spinner = $('.loading-spinner');
$('#click-me').on("click", function(){
spinner.addClass('active'); // ativa o loading
// Espera 5 segundos e desativa o loading
setTimeout(function(){
spinner.removeClass('active');
}, 5000);
});
.loading-spinner {
background: #333;
background: rgba(0, 0, 0, 0.8);
position: fixed;
top: 0;
right: 0;
bottom: 0;
left: 0;
overflow: hidden;
display: none;
}
.loading-spinner.active {
display: block;
}
#hourglass { /* centraliza no meio da tela */
position: absolute;
top: 50%;
left: 50%;
margin: -32px 0 0 -32px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><divclass="loading-spinner">
<svg id="hourglass" width='64px' height='64px' xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" class="uil-hourglass"><rect x="0" y="0" width="100" height="100" fill="none" class="bk"></rect><g><path fill="none" stroke="#007282" stroke-width="5" stroke-miterlimit="10" d="M58.4,51.7c-0.9-0.9-1.4-2-1.4-2.3s0.5-0.4,1.4-1.4 C70.8,43.8,79.8,30.5,80,15.5H70H30H20c0.2,15,9.2,28.1,21.6,32.3c0.9,0.9,1.4,1.2,1.4,1.5s-0.5,1.6-1.4,2.5 C29.2,56.1,20.2,69.5,20,85.5h10h40h10C79.8,69.5,70.8,55.9,58.4,51.7z" class="glass"></path><clipPath id="uil-hourglass-clip1"><rect x="15" y="20" width="70" height="25" class="clip"><animate attributeName="height" from="25" to="0" dur="1s" repeatCount="indefinite" vlaues="25;0;0" keyTimes="0;0.5;1"></animate><animate attributeName="y" from="20" to="45" dur="1s" repeatCount="indefinite" vlaues="20;45;45" keyTimes="0;0.5;1"></animate></rect></clipPath><clipPath id="uil-hourglass-clip2"><rect x="15" y="55" width="70" height="25" class="clip"><animate attributeName="height" from="0" to="25" dur="1s" repeatCount="indefinite" vlaues="0;25;25" keyTimes="0;0.5;1"></animate><animate attributeName="y" from="80" to="55" dur="1s" repeatCount="indefinite" vlaues="80;55;55" keyTimes="0;0.5;1"></animate></rect></clipPath><path d="M29,23c3.1,11.4,11.3,19.5,21,19.5S67.9,34.4,71,23H29z" clip-path="url(#uil-hourglass-clip1)" fill="#ffab00" class="sand"></path><path d="M71.6,78c-3-11.6-11.5-20-21.5-20s-18.5,8.4-21.5,20H71.6z" clip-path="url(#uil-hourglass-clip2)" fill="#ffab00" class="sand"></path><animateTransform attributeName="transform" type="rotate" from="0 50 50" to="180 50 50" repeatCount="indefinite" dur="1s" values="0 50 50;0 50 50;180 50 50" keyTimes="0;0.7;1"></animateTransform></g></svg>
</div>
<button type="button" id="click-me">Click Me</button>