CSS shake animation

by Konstantin Rouda

HTML

<div class="c-parent">
  <div class="c-child">Hello</div>
</div>

CSS

HTML {
  font-size: 100%;
  line-height: 1.5;
  box-sizing: border-box;
}

BODY {
  /*using fluid typography (https://goo.gl/o9sRyq)*/
  font-size: calc(20px + (30 - 20) * (100vw - 300px) / (700 - 300) );
  margin: 0;
  color: #3a3d40;
}

*, *::before, *::after {
  box-sizing: inherit;
  color: inherit;
}



.c-parent {
  width: 10rem;
  height: 5rem;
  margin: 1rem auto 0;
  border: 1px solid cornflowerblue;
  border-radius: .11rem;
}

.c-child {
  max-width: 50%;
  height: 3rem;
  margin: .1rem auto;
  background: firebrick;
  animation: shake 0.08s 0.1s infinite;
  animation-play-state: paused;
}

.c-parent:hover .c-child {
  animation-play-state: running;
}



@keyframes shake {
  0% { transform: translateX(0); }
  50% { transform: translateX(-1px); }
  100% { transform: translateX(2px); }
}

JavaScript

/*
Example from:
https://youtu.be/hWni4GCiJ_s?t=12m17s
*/