12/20/2023 0 Comments Display flex vertical align middleThe perpendicular direction is therefore the cross axis. This "main" direction is what we call the flex items' main axis. window-width on the other hand is not really needed because each element which has display: block automatically spans the full available width.Items in Flexbox are arranged horizontally or vertically depending on whether you specify row or column for your flex-direction. ![]() ![]() This would not work if there was something other displayed, like a top bar, because then you would have a scroll bar, or had to do something like this: height: calc(100vh-$top-bar-height). It sets the height of the div to 100vh which stands for the whole viewport height. Row sets the display property to flex, justify-center centers it horizontally and items-center centers it vertically.īut in order to work, we need a height for the element. The interesting part is the classes applied to the wrapping div: window-height window-width row justify-center items-center If you want centered login form, try this snippet: Go ahead and inspect the height of the elements in your example and you will notice, that they are exactly the height they need. So to have an element centered vertically (at least to be able to see a vertical center), the element must have a higher height than the auto calculated, which should make sense and is not an issue with CSS but how the box model works. ![]() Even if you give it the full-height class, it only sets the height to 100% of the parent div. Normally a div only has the height it needs. Oh, the hard coded height is only there to visualize the centering.
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