Backed out changeset c3799309b95c (bug 1642364) for wpt failures on abspos-dialog-layout.html . CLOSED TREE

layout/style/res/html.css

@@ -828,7 +828,6 @@ dialog {
   padding: 1em;
   background: white;
   width: -moz-fit-content;
-  height: -moz-fit-content;
 }
 
 dialog:not([open]) {
@@ -837,13 +836,6 @@ dialog:not([open]) {
 
 dialog:-moz-modal-dialog {
   -moz-top-layer: top !important;
-  /* This is a temporary solution until the relevant CSSWG issues are resolved */
-  position: fixed;
-  max-height: 100vh;
-  max-width: 100vw;
-  top: 50%;
-  transform: translateY(-50%);
-  overflow: auto;
 }
 
 /* https://html.spec.whatwg.org/#flow-content-3 */

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/abspos-dialog-layout.html.ini

@@ -1,11 +1,34 @@
 [abspos-dialog-layout.html]
-  prefs:[dom.dialog_element.enabled:true]
+  [showModal() should center in the viewport]
+    expected: FAIL
+
+  [The dialog is a positioned element, so the top and bottom should not have style auto.]
+    expected: FAIL
+
+  [Dialog should be recentered if showModal() is called after close()]
+    expected: FAIL
+
+  [Dialog should not recenter on relayout.]
+    expected: FAIL
+
+  [A tall dialog should be positioned at the top of the viewport.]
+    expected: FAIL
+
   [The dialog should be centered regardless of the presence of a horizontal scrollbar.]
     expected: FAIL
 
   [Centering should work when dialog is inside positioned containers.]
     expected: FAIL
 
+  [A centered dialog's position should survive becoming display:none temporarily.]
+    expected: FAIL
+
+  [Dialog should lose centering when removed from the document.]
+    expected: FAIL
+
+  [Dialog's specified position should survive after close() and showModal().]
+    expected: FAIL
+
   [Dialog should be recentered if showModal() is called after removing 'open'.]
     expected: FAIL