| <!doctype html> |
| <meta charset="utf-8"> |
| <title>Tests that after making a button a containing block, dynamically-inserted abspos boxes still get positioned correctly</title> |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1740439"> |
| <link rel="help" href="https://drafts.csswg.org/css-position/#abspos-insets"> |
| <link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez"> |
| <link rel="author" href="https://mozilla.org" title="Mozilla"> |
| <link rel="match" href="containing-block-change-button-ref.html"> |
| <style> |
| #button { |
| width: 400px; |
| height: 400px; |
| margin: 50px; |
| background-color: purple; |
| border: 0; |
| padding: 10px; |
| } |
| #button > div { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| background-color: green; |
| /* Vertically centered to match in-flow button layout of the reference */ |
| top: 150px; |
| left: 0; |
| } |
| </style> |
| <button id="button"></button> |
| <script> |
| let button = document.getElementById("button"); |
| button.getBoundingClientRect(); |
| button.style.position = "relative"; |
| button.getBoundingClientRect(); |
| button.appendChild(document.createElement("div")); |
| </script> |
