title: minimal JS sources for wiping out the whole DOM
body: <p><em>This originally came as a spin off from <a href="https://stackoverflow.com/q/45390025/1737973._">https://stackoverflow.com/q/45390025/1737973.</em></a></p>
  
  <p>Sometimes, when JS is supported and enabled in the browser, I find it more useful to rebuild most the DOM (notably under the <code>body</code> tag) from scratch, rather than style and give life and RIA to it.</p>
  
  <p><strong>Which are the vanilla JS sources for wiping out all DOM under the <code>body</code> tag in a concise, short yet efficient way?</strong></p>