New CSS Viewport Units Do Not Solve The Classic Scrollbar Problem — Smashing Magazine
Since the introduction of CSS viewport units in 2012, many of us have been using `width: 100vw` as a way to set an element’s width to the full width of the viewport. But, as Šime Vidas explains in this deep dive, `100vw` does not always represent the full width of the viewport due to differences in how browsers handle scrollbars.
Source: smashingmagazine.com