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About the <head>

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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <html>
<head>

<link rel="stylesheet" href="css/style.css" />
<link href='https://fonts.googleapis.com/css?family=Actor' rel='stylesheet' type='text/css'>
</head>

<body>
<div class="loader">
    <h1>LOADING</h1>
    <span>
      <?xml version="1.0" encoding="UTF-8"?>
<svg width="174px" height="174px" viewBox="0 0 174 174" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 61.2 (89653) - https://sketch.com -->
    <title>ico</title>
    <desc>Created with Sketch.</desc>
    <defs>
        <linearGradient x1="50%" y1="0%" x2="50%" y2="100%" id="linearGradient-1">
            <stop stop-color="#F5D9C8" offset="0%"></stop>
            <stop stop-color="#F5D9C8" offset="100%"></stop>
        </linearGradient>
    </defs>
    <g id="页面-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <path d="M87.5,18 C93.5860054,18 97.7564794,19.9946593 100.011422,23.9839779 L169.769006,133.56269 C171.764672,139.593407 171.333834,144.610849 168.476493,148.615017 C165.619152,152.619185 161.335564,155.080846 155.62573,156 L18.3609254,156 C12.3750477,155.763123 8.18608471,153.301462 5.7940363,148.615017 C3.4019879,143.928572 3.4019879,138.461474 5.7940363,132.213722 L74.0152353,23.9839779 C76.919073,19.9946593 81.4139946,18 87.5,18 Z" id="形状结合" fill="url(#linearGradient-1)"></path>
        <rect id="矩形备份-3" x="1" y="0" width="174" height="174"></rect>
    </g>
</svg>
  </span>
    <span>
      <?xml version="1.0" encoding="UTF-8"?>
<svg width="174px" height="174px" viewBox="0 0 174 174" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 61.2 (89653) - https://sketch.com -->
    <title>ico</title>
    <desc>Created with Sketch.</desc>
    <g id="页面-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <path d="M87.5,18 C93.5860054,18 97.7564794,19.9946593 100.011422,23.9839779 L169.769006,133.56269 C171.764672,139.593407 171.333834,144.610849 168.476493,148.615017 C165.619152,152.619185 161.335564,155.080846 155.62573,156 L18.3609254,156 C12.3750477,155.763123 8.18608471,153.301462 5.7940363,148.615017 C3.4019879,143.928572 3.4019879,138.461474 5.7940363,132.213722 L74.0152353,23.9839779 C76.919073,19.9946593 81.4139946,18 87.5,18 Z" id="形状结合备份" fill="#F03053"></path>
        <rect id="矩形" x="0" y="0" width="174" height="174"></rect>
    </g>
</svg>
  </span>
    <span>
      <?xml version="1.0" encoding="UTF-8"?>
<svg width="174px" height="174px" viewBox="0 0 174 174" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 61.2 (89653) - https://sketch.com -->
    <title>ico</title>
    <desc>Created with Sketch.</desc>
    <g id="页面-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <path d="M87.5,18 C93.5860054,18 97.7564794,19.9946593 100.011422,23.9839779 L169.769006,133.56269 C171.764672,139.593407 171.333834,144.610849 168.476493,148.615017 C165.619152,152.619185 161.335564,155.080846 155.62573,156 L18.3609254,156 C12.3750477,155.763123 8.18608471,153.301462 5.7940363,148.615017 C3.4019879,143.928572 3.4019879,138.461474 5.7940363,132.213722 L74.0152353,23.9839779 C76.919073,19.9946593 81.4139946,18 87.5,18 Z" id="形状结合" fill="#FAA2A7"></path>
        <rect id="矩形备份-3" x="1" y="0" width="174" height="174"></rect>
    </g>
</svg>
  </span>
</div>
</body>
</html>
!

CSS 

              
                body{
	background:#333;
	background: -webkit-gradient(radial, center center, 120, center center, 900, from(#33495E), to(#2E2329));
	background:-moz-radial-gradient(circle, #33495E, #2E2329);

}
.loader{
	margin:200px auto;
}
h1{
	font-family: 'Actor', sans-serif;
	color:#FFF;
	font-size:16px;
	letter-spacing:1px;
	font-weight:200;
	text-align:center;
}
.loader span{
	width:30px;
	height:30px;
	border-radius:50%;
	display:inline-block;
	position:absolute;
	left:50%;
	margin-left:-10px;
	-webkit-animation:3s infinite linear;
	-moz-animation:3s infinite linear;
	-o-animation:3s infinite linear;
	
}


.loader span:nth-child(2){
	-webkit-animation:kiri 1.2s infinite linear;
	-moz-animation:kiri 1.2s infinite linear;
	-o-animation:kiri 1.2s infinite linear;
	
}
.loader span:nth-child(3){
	z-index:100;
}  
.loader span svg{
    width:100%;
    height:auto;
  }
.loader span:nth-child(4){
	-webkit-animation:kanan 1.2s infinite linear;
	-moz-animation:kanan 1.2s infinite linear;
	-o-animation:kanan 1.2s infinite linear;
}


@-webkit-keyframes kanan {
    0% {-webkit-transform:translateX(20px);
    }
   
	50%{-webkit-transform:translateX(-20px);
	}
	
	100%{-webkit-transform:translateX(20px);
	z-index:200;
	}
}
@-moz-keyframes kanan {
    0% {-moz-transform:translateX(20px);
    }
   
	50%{-moz-transform:translateX(-20px);
	}
	
	100%{-moz-transform:translateX(20px);
	z-index:200;
	}
}
@-o-keyframes kanan {
    0% {-o-transform:translateX(20px);
    }
   
	50%{-o-transform:translateX(-20px);
	}
	
	100%{-o-transform:translateX(20px);
	z-index:200;
	}
}




@-webkit-keyframes kiri {
     0% {-webkit-transform:translateX(-20px);
	z-index:200;
    }
	50%{-webkit-transform:translateX(20px);
	}
	100%{-webkit-transform:translateX(-20px);
	}
}

@-moz-keyframes kiri {
     0% {-moz-transform:translateX(-20px);
	z-index:200;
    }
	50%{-moz-transform:translateX(20px);
	}
	100%{-moz-transform:translateX(-20px);
	}
}
@-o-keyframes kiri {
     0% {-o-transform:translateX(-20px);
	z-index:200;
    }
	50%{-o-transform:translateX(20px);
	}
	100%{-o-transform:translateX(-20px);
	}
}
!

JS
!
999px

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