Position Absolute Clipped

When I have a position absolute inside of my application, it gets clipped by its parent container's height.

by incutonez

HTML

<div id="app">
  <div class="container">
    <div class="content">
      Content 1
    </div>
    <div class="absolute">
      <div class="child">
        Should Scroll as Content but show over parent's height
      </div>
    </div>
  </div>
</div>

CSS

#app {
  position: relative;
}

.container {
  height: 100px;
  /* If I take this off, I get the desired behavior */
  overflow: auto;
  position: relative;
}

.content {
  height: 1000px;
  width: 100%;
  color: white;
  background-color: darkblue;
}

.absolute {
  position: absolute;
  z-index: 10;
  top: 20px;
  left: 0;
  width: 300px;
  height: auto;
  overflow: visible;
  background-color: black;
  color: white;
}

.child {
  height: 200px;
}

body, html {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

body {
  overflow: auto;
}