VH and VW don't update in Safari on window resize

[nfiniteset]

VH and VW don't update in Safari on window resize

[mrlarner]

I'm unfamiliar with vh/vw, but wanted to ask what the benefit is over something like rem? Is it just automatic, allowing you to avoid setting global font-size breakpoints?

[nfiniteset]

vh and vw are a little different from rem.

vh and vw are proportionate to the width and height of the viewport.

1vw == window.document.width/100

rem is proportionate to the font-size of the html element.

1rem == $('html').css('font-size')

You can use rem to achieve a similar effect, as seen here,
but you would have to use javascript to set the font-size of the html element as a fraction of the window width.

vm is another cool unit. It's equal to 1% of the smaller of vw and vh.

vh/vw/vm are dynamic (at least in chrome, safari doesn't want to recalculate them on resize).
So they allow resizing on a spectrum rather than on discrete points.

Support is decent in modern browsers.
http://caniuse.com/#feat=viewport-units