html,body,svg { height:100% }

HTML

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

<svg viewBox="0 0 130 100" xmlns="http://www.w3.org/2000/svg">
  <!--
  with relative unit such as percentage, the visual size
  of the square looks unchanged regardless of the viewBox
  -->
  <rect x="0" y="0" width="100%" height="100%"/>

  <!--
  with a large viewBox the circle looks small
  as it is using user units for the r attribute:
  4 resolved against 100 as set in the viewBox
  -->
  <circle cx="50%" cy="50%" r="4" fill="white"/>
</svg>

CSS

html,body,svg { height:100% }
svg:not(:root) { display: inline-block; }

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html,body,svg { height:100% }

HTML

CSS

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Use pre-released features

Fiddle collections

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