title: Difference between Width:100% and width:100vw?
body: <p>I have to fit an iframe in screen height. Obviously, I wanted 100% as in width but, since that doesn't work, I used 100vh.
  But vh like  vw is not exactly 100%.
  In my laptop through chrome while the 100% width renders perfectly without the need for a horizontal scroll bar, vw has about a centimeter extra.</p>