Making jagged triangle border in CSS

Question

I have a shape with an edge like this in Photoshop:

Is it possible to make the repeated trian

Answer 1

Personally, I think clip-path is easier to work with/understand than complex background gradients.

body {
  font-family:Roboto,'Open Sans',Helvetica,sans-serif;
}
.container {
  background:#ffffd;
  margin:0 auto; 
  max-width:800px;
  padding:30px;
}
h1:first-child {margin:0;}

.jagged-bottom {
  position:relative;
}
.jagged-bottom:after {
    background:#ffffd;
    content:"";
    height:2vw;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    clip-path:polygon(
       0 0, 2.5% 100%, 5% 0,  7.5% 100%, 
     10% 0,12.5% 100%,15% 0, 17.5% 100%, 
     20% 0,22.5% 100%,25% 0, 27.5% 100%, 
     30% 0,32.5% 100%,35% 0, 37.5% 100%, 
     40% 0,42.5% 100%,45% 0, 47.5% 100%, 
     50% 0,52.5% 100%,55% 0, 57.5% 100%, 
     60% 0,62.5% 100%,65% 0, 67.5% 100%, 
     70% 0,72.5% 100%,75% 0, 77.5% 100%, 
     80% 0,82.5% 100%,85% 0, 87.5% 100%, 
     90% 0,92.5% 100%,95% 0, 97.5% 100%, 100% 0);
  }
}

  
Looks Like A Receipt
  
Simply adjust the clip path on the pseudo-element if you want more or fewer spikes, and the height if you want them to be taller or shorter.