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Article

Some Things You Oughta Know When Working with Viewport Units

David Chanin has a quickie article summarizing a problem with setting an element's height to 100vh in mobile browsers and then also positioning something on the bottom of that. … Read article

Article

Bounce Element Around Viewport in CSS

Let's say you were gonna bounce an element all around a screen, sorta like an old school screensaver or Pong or something.

You'd probably be tracking the X location of the element, increasing or decreasing it in a time loop and — when the element reached the maximum or minimum value — it would reverse direction. Then do that same thing with the Y location and you've got the effect we're after. Simple enough with some JavaScript and math. … Read article

Article

The trick to viewport units on mobile

Viewport units have always been controversial and some of that is because of how mobile browsers have made things more complicated by having their own opinions about how to implement them.

Case in point: should the scrollbar be taken into account for the vw unit? What about a site's navigation or page controls — should those count in the calculation? Then there are physical attributes of the devices themselves (hello, notch!) that can't be overlooked.… Read article

Article

Simple Little Use Case for `vmin`

Viewport units are things like 10vw (10% of the viewport width) or 2vh (2% of the viewport height). Useful sometimes, as they are always relative to the viewport. No cascading or influence by parent elements.

There is also vmin, which is the lesser of vw and vh, and vmax, which is the greater. These values can be used for anything that takes a length value, just like px or em or % or whatever.

Let's take a look at a … Read article

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