html,body,svg { height:100% }

by CreativeDreams

HTML

<!-- Learn about this code on MDN: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/rect -->

<svg viewBox="0 0 1 1" xmlns="http://www.w3.org/2000/svg">
  <!-- Rounded corner rectangle -->
  <rect x="0" width="1" height="1"  />
</svg>

CSS

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

svg {
  width: 200px !important;
  height: 100px !important;
}