<!DOCTYPE html> <html><head> <title>CSS Flexible Box Test: flex-direction proprety - column</title> <link href="mailto:haosdent@gmail.com" rel="author" title="haosdent"> <link href="http://www.w3.org/TR/css-flexbox-1/#flex-direction-property" rel="help"> <link href="reference/ttwf-reftest-flex-direction-column-ref.htm" rel="match"> <meta content="Statement describing what the test case is asserting" name="assert"> <style type="text/css"> /* Positioned container allows for the self-describing statement to still be visible in the case of failure */ .container { position: relative; display: flex; flex-direction: column; background: red; margin: 1em 0; border: 1px solid black; } span { display: inline-block; background: green; color: white; margin: 1em; width: 8em; } </style> </head> <body> <p>The test passed if you see all the cells are arraged vertically.</p> <div class="container"> <span>first</span> <span>second</span> <span>third</span> <span>forth</span> </div> </body></html>