|  | <!DOCTYPE html> | 
|  | <html class="reftest-wait"> | 
|  | <meta charset="utf-8"> | 
|  | <title>CSS Multi-column Layout Test: Add block1 before block2. It should join the column content box with | 
|  | block2, not with the spanner</title> | 
|  | <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com"> | 
|  | <link rel="author" title="Mozilla" href="http://www.mozilla.org/"> | 
|  | <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span"> | 
|  | <link rel="match" href="multicol-span-all-dynamic-add-001-ref.html"> | 
|  | <meta name="assert" content="This test checks a dynamically added block element should be rendered correctly in a column hierarchy containing a column-span."> | 
|  |  | 
|  | <script> | 
|  | function runTest() { | 
|  | document.body.offsetHeight; | 
|  |  | 
|  | /* Add block1 before block2. It should join the column content box with | 
|  | block2, not with the spanner. */ | 
|  | var block = document.createElement("div"); | 
|  | var text = document.createTextNode("block1"); | 
|  | block.appendChild(text); | 
|  |  | 
|  | var column = document.getElementById("column"); | 
|  | column.insertBefore(block, column.children[1]); | 
|  |  | 
|  | document.documentElement.removeAttribute("class"); | 
|  | } | 
|  | </script> | 
|  |  | 
|  | <style> | 
|  | #column { | 
|  | column-count: 3; | 
|  | column-rule: 6px solid; | 
|  | width: 400px; | 
|  | outline: 1px solid black; | 
|  | } | 
|  | h3 { | 
|  | column-span: all; | 
|  | outline: 1px solid blue; | 
|  | } | 
|  | </style> | 
|  |  | 
|  | <body onload="runTest();"> | 
|  | <article id="column"> | 
|  | <h3>spanner</h3> | 
|  | <div>block2</div> | 
|  | </article> | 
|  | </body> | 
|  | </html> |