这是Lucas Bebber的Glitch SVG效果。
这是原始且可用的演示
这是代码片段
body {
background: black;
font-family: 'Varela', sans-serif;
}
.glitch {
color: white;
font-size: 100px;
position: relative;
width: 400px;
margin: 0 auto;
}
@keyframes noise-anim {
$steps: 20;
@for $i from 0 through $steps {
# {
percentage($i*(1/$steps))
}
{
clip: rect(random(100)+px, 9999px, random(100)+px, 0);
}
}
}
.glitch:after {
content: attr(data-text);
position: absolute;
left: 2px;
text-shadow: -1px 0 red;
top: 0;
color: white;
background: black;
overflow: hidden;
clip: rect(0, 900px, 0, 0);
animation: noise-anim 2s infinite linear alternate-reverse;
}
@keyframes noise-anim-2 {
$steps: 20;
@for $i from 0 through $steps {
# {
percentage($i*(1/$steps))
}
{
clip: rect(random(100)+px, 9999px, random(100)+px, 0);
}
}
}
.glitch:before {
content: attr(data-text);
position: absolute;
left: -2px;
text-shadow: 1px 0 blue;
top: 0;
color: white;
background: black;
overflow: hidden;
clip: rect(0, 900px, 0, 0);
animation: noise-anim-2 3s infinite linear alternate-reverse;
}
<link href='http://fonts.googleapis.com/css?family=Varela' rel='stylesheet' type='text/css'>
<div class="glitch" data-text="GLITCH">GLITCH</div>
http://code.tutsplus.com/tutorials/how-to-generate-noise-with-canvas--net-16556
这里有一个演示:http://jsfiddle.net/AbdiasSoftware/vX7NK/
我相信代码的这部分正在创建随机静态内容:buffer32[i++] = ((255 * Math.random())|0) << 24;