<style>
  .markmap {
    position: relative;
  }
  .markmap > svg {
    width: 100%;
    height: 80vh;
  }
</style>

<div class="markmap">
  <script type="text/template">
---
title: ThisIsNotATest
markmap:
  colorFreezeLevel: 3
  initialExpandLevel: 3
---