title: Is it possible to calculate the Viewport Width (vw) without scrollbar?
body: <p>As mentioned in the title, is it possible to calculate the <code>vw</code> without the scrollbars in css only?</p>
  
  <p>For example, my screen has a width of <code>1920px</code>. <code>vw</code> returns <code>1920px</code>, great. But my actual body width is only something like <code>1903px</code>.</p>
  
  <p>Is there a way for me to retrieve the <code>1903px</code> value with css only (not only for direct children of the <code>body</code>), or do I absolutely need JavaScript for this?</p>