jquery心形点赞关注效果的简单实现

<div class="stage"> 
 <div class="heart"></div> 
</div>

.heart { 
 width: 100px; 
 height: 100px; 
 background: url("") no-repeat; 
 background-position: 0 0; 
 cursor: pointer; 
 -webkit-transition: background-position 1s steps(28); 
 transition: background-position 1s steps(28); 
 -webkit-transition-duration: 0s; 
     transition-duration: 0s; 
} 
.heart.is-active { 
 -webkit-transition-duration: 1s; 
     transition-duration: 1s; 
 background-position: -2800px 0; 
} 
 
body { 
 background: -webkit-linear-gradient(315deg, #121721 0%, #000000 100%) fixed; 
 background: linear-gradient(135deg, #121721 0%, #000000 100%) fixed; 
 color: #FFF; 
 font: 300 16px/1.5 "Open Sans", sans-serif; 
} 
 
.stage { 
 position: fixed; 
 top: 50%; 
 left: 50%; 
 -webkit-transform: translate(-50%, -50%); 
     transform: translate(-50%, -50%); 
} 

$(function() { 
 $(".heart").on("click", function() { 
  $(this).toggleClass("is-active"); 
 }); 
});