The height of the centered divs doesn't matter. In both cases the height of the centered divs can be variable, undefined, unknown, whatever. One for vertically-aligned flex items ( flex-direction: column) and the other for horizontally-aligned flex items ( flex-direction: row). How to Center Elements Vertically and Horizontally in Flexboxīelow are two general centering solutions. row container is not needed unless you want to add some styling around the elements (background image, borders and so on).
The flex-flow, flex-direction, flex-wrap properties could have made this design easier to implement. flex-container needs a height to see the vertical alignment effect, otherwise, the container computes the minimum height needed to enclose the content, which is less than the view port height in this example.
row to be centered vertically in the view port, assign 100% height to html and body, and also zero out the body margins. row, set the width to auto instead of 100%. flex-item elements should be block level ( div instead of span) if you want the height and top/bottom padding to work properly.Īlso, on.
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