<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <meta charset="utf-8"> <title>CSS Flexbox Test: Fragmentation of a fixed block-size single-line column flex container and a fixed block-size flex item that has overflows</title> <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com"> <link rel="author" title="Mozilla" href="http://www.mozilla.org/"> <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination"> <link rel="match" href="flexbox-single-column-vertical-lr-6-ref.html"> <meta name="assert" content="This test verifies fragmentation of a fixed block-size flex item that has overflows in a fixed block-size single-line column flex container."> <style> html { writing-mode: vertical-lr; } .multicol { block-size: 50px; inline-size: 190px; column-width: 40px; column-fill: auto; column-gap: 10px; border: 5px solid orange; margin-block-end: 5px; /* Just to separate each sub-testcase visually. */ } .flexContainer { display: flex; flex-wrap: nowrap; flex-direction: column; background: gray; /* border-width is 0 by default; some sub-testcases will increase it. */ border: 0 solid lightgray; /* Block-size is deliberately made shorter than its flex items. */ block-size: 40px; } .border-padding { border-block-width: 10px; padding-block: 5px; } article { inline-size: 30px; /* Block-size is deliberately made shorter than its <div> child. */ block-size: 70px; background: cyan; } article > div { inline-size: 20px; block-size: 140px; background: magenta; } </style> <body> <!-- Basic one without any margin/border/padding. --> <div class="multicol"> <div class="flexContainer"> <article><div></div></article> </div> </div> <!-- Test a container with margin-block-start. --> <div class="multicol"> <div class="flexContainer" style="margin-block-start: 25px"> <article><div></div></article> </div> </div> <!-- Test a container not at the top of the column/page. --> <div class="multicol"> <div style="block-size: 25px"></div> <div class="flexContainer"> <article><div></div></article> </div> </div> <!-- Test a container with border and padding. --> <div class="multicol"> <div class="flexContainer border-padding"> <article><div></div></article> </div> </div> </body> </html>