| <!DOCTYPE html> |
| <p>There should be a green square below, and no red.</p> |
| <div id="outer" style="columns:2; column-gap:0; width:20px; line-height:20px; background:red;"> |
| <div style="columns:1; column-gap:0; background:green;"> |
| <div><br></div> |
| <div style="break-before:column;"><br></div> |
| </div> |
| </div> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script> |
| test(() => { |
| var elm = document.getElementById("outer"); |
| assert_equals(elm.offsetHeight, 20); |
| }, "Inner column count is 1"); |
| </script> |
