flex direction Flex direction sets the axis in which the items are positioned. By default it is set to 'row' but optionally 'row-reverse', 'column' or 'column-reverse' can be used. #css#flex <style> .flex-direction{ display: flex; flex-direction: column; } .flex-direction span{ border: 1px solid #4dc3a4; padding: 6px; } </style> <span class="flex-direction"> <span>Element 1</span> <span>Element 2</span> <span>Element 3</span> </span> Output: Element 1 Element 2 Element 3 copy