<!DOCTYPE html> <link rel="help" href="https://drafts.csswg.org/css-overflow-3/#scrollable"> <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/129"> <style> scrollable-container { display: block; width: 100px; height: 100px; overflow: scroll; padding: 10px 5px; line-height: 0; } scrollable-container > div { position: relative; writing-mode: horizontal-tb; direction: ltr; outline: solid red 2px; } </style> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="/resources/check-layout-th.js"></script> <body onload="checkLayout('scrollable-container')"> <!-- All of these tests have a child which contributes to the "alignment rectangle" ("infow-bounds" in Blink). However doesn't directly contribute to the scrollable-overflow as it is relative-positioned before the "scroll origin" edge(s). All of these tests have an inline/block end margin (wrt. the parent writing-mode + direction). --> <!-- HTB + LTR --> <div style="writing-mode: horizontal-tb; direction: ltr;"> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px; display: inline-block;"></div> </scrollable-container> <!-- For this specific case collapsed-margins affect the size of the alignment rectangle. --> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; margin-bottom: 100px; top: -1000px;"> <div style="height: 200px; margin-bottom: -50px;"></div> </div> </scrollable-container> </div> <!-- HTB + RTL --> <div style="writing-mode: horizontal-tb; direction: rtl;"> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; margin-bottom: 100px; top: -1000px;"> <div style="height: 200px; margin-bottom: -50px;"></div> </div> </scrollable-container> </div> <!-- VRL + LTR --> <div style="writing-mode: vertical-rl; direction: ltr;"> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="height: 0; margin-left: 100px; right: -1000px;"> <div style="width: 200px; margin-left: -50px;"></div> </div> </scrollable-container> </div> <!-- VRL + RTL --> <div style="writing-mode: vertical-rl; direction: rtl;"> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-top: 50px; bottom: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-left: 50px; right: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-top: 50px; bottom: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="height: 0; margin-left: 100px; right: -1000px;"> <div style="width: 200px; margin-left: -50px;"></div> </div> </scrollable-container> </div> <!-- VLR + LTR --> <div style="writing-mode: vertical-lr; direction: ltr;"> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-bottom: 50px; top: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="height: 0; margin-right: 100px; left: -1000px;"> <div style="width: 200px; margin-right: -50px;"></div> </div> </scrollable-container> </div> <!-- VLR + RTL --> <div style="writing-mode: vertical-rl; direction: rtl;"> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-top: 50px; bottom: -1000px;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="width: 200px; height: 0; margin-right: 50px; left: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-height="270"> <div style="width: 0; height: 200px; margin-top: 50px; bottom: -1000px; display: inline-block;"></div> </scrollable-container> <scrollable-container data-expected-scroll-width="260"> <div style="height: 0; margin-right: 100px; left: -1000px;"> <div style="width: 200px; margin-right: -50px;"></div> </div> </scrollable-container> </div>