| <!DOCTYPE html> | 
 | <link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org"> | 
 | <link rel="help" href="https://www.w3.org/TR/css-break-3/#unforced-breaks"> | 
 | <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> | 
 | <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> | 
 | <div style="columns:3; column-fill:auto; column-gap:0; width:300px; height:50px;"> | 
 |   <div style="width:200px; height:0;"> | 
 |     <div style="height:20px; background:red;"></div> | 
 |   </div> | 
 |   <!-- No valid breakpoint here, since the preceding sibling takes up no space | 
 |        (and its overflowing child ends up in a parallel flow). --> | 
 |   <div style="height:120px;"> | 
 |     <!-- Can't break inside lines. Let it overflow the (shorter) fragmentainer, | 
 |          but not its container. Consume 100px from it. --> | 
 |     <div style="display:inline-block; vertical-align:top; width:100px; height:100px; background:green;"></div> | 
 |   </div> | 
 |   <div style="margin-top:-20px; height:20px; background:white;"></div> | 
 | </div> |