Styling HTML and BODY selector to height: 100%; vs using 100vh

Question

My brother and I were messing around in sublime earlier and he suddenly shout out, \"I learned something new!\"

A little shocked, I asked, \"What\'s that..?\"

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Answer 1

height: 100vh = 100% of the viewport height

height: 100% = 100% of the parent's element height

That is why you need to add height: 100% on html and body, as they don't have a size by default

Something you have to know : if you use % for vertical margin or padding, % will be calculated on the width of the parent element, not the height.

Tip : try using vh and vw units for font size :) I like this one (not supported in some browsers I know) : font-size: calc(.5vh + .5vw); (for example)

See a nice page here for CSS units : http://css-tricks.com/the-lengths-of-css/