| <!DOCTYPE html> |
| <p>There should be a blue square below.</p> |
| <div style="position:relative; columns:2; column-gap:0; column-fill:auto; width:200px; height:100px;"> |
| <div style="height:100px;"></div> |
| <div id="elm" style="margin-top:50px; height:100px; background:blue;"></div> |
| </div> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script> |
| test(() => { |
| var elm = document.getElementById("elm"); |
| assert_equals(elm.offsetLeft, 100); |
| assert_equals(elm.offsetTop, 0); |
| }, "Margins should collapse with fragmentainer boundaries"); |
| </script> |
