| <!DOCTYPE html> |
| <title>Filtered block becomes containing block of absolutely positioned child</title> |
| <link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org"> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#FilterProperty" title="5. Graphic filters: the filter property"> |
| <meta name="assert" content="A filtered block will be a containing block for absolutely positioned descendants. If all this takes place inside a multicol container, this means that the absolutely positioned box also has the multicol container in its containing block, which means that it should be fragmented."> |
| <div id="multicol" style="columns:2;"> |
| <div id="container" style="height:100px;"> |
| <!-- The spanner is here to trigger the crash in crbug.com/847328 --> |
| <div style="column-span:all;"></div> |
| <div id="abspos" style="position:absolute; height:100px;"></div> |
| </div> |
| </div> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| test(() => { |
| let container = document.getElementById("container"); |
| let abspos = document.getElementById("abspos"); |
| document.body.offsetTop; |
| assert_equals(abspos.getBoundingClientRect().height, 100); |
| container.style.filter = "opacity(0.5)"; |
| assert_equals(abspos.getBoundingClientRect().height, 50); |
| // The last step will cause a crash if crbug.com/847328 is present |
| document.body.offsetTop; |
| abspos.style.display = "none"; |
| }, "Making a container filtered, and then removing an abspos child"); |
| </script> |
