third_party/WebKit/LayoutTests/dialog/top-layer-containing-block.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <style>
   5 ::backdrop {
   6     display: none;
   7 }
   8 </style>
   9 </head>
  10 <body>
  11 <p>
  12 This tests that a modal dialog's containing block is in the initial containing block and that it is unaffected by
  13 ancestor elements with overflow or opacity.
  14 <div style="position: absolute; top: 400px; opacity: 0.3">
  15     <dialog id="opaqueDialog" style="position: absolute; top: 250px; left: 0px; background-color: magenta">
  16         This dialog should be unaffected by its ancestor with opacity.
  17     </dialog>
  18 </div>
  19 <div style="position: absolute; overflow: hidden; width: 500px; height: 150px; top: 400px; left: 300px">
  20     <dialog id="unclippedDialog" style="position: absolute; top: 200px; left: 0px; height: 100px; background-color: cyan">
  21         This dialog should be unaffected by its ancestor with overflow. It should not be clipped.
  22     </dialog>
  23 </div>
  24 <div style="position: absolute; top: 1000px; left: 1000px; width: 20px;">
  25     <dialog id="bottomDialog" style="position: absolute; top: 100px; height: 250px; width: 90%; background-color: yellow">
  26         This dialog should be onscreen with a width of 90% of the page. It is the child of an narrow element
  27         positioned off screen, but the containing block of a top layer element is the initial containing block, so its
  28         position and percent lengths are relative to that.
  29     </dialog>
  30 </div>
  31 <script>
  32 document.getElementById('bottomDialog').showModal();
  33 document.getElementById('unclippedDialog').showModal();
  34 document.getElementById('opaqueDialog').showModal();
  35 </script>
  36 </body>
  37 </html>