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-rw-r--r--components/style/properties/longhand/box.mako.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/components/style/properties/longhand/box.mako.rs b/components/style/properties/longhand/box.mako.rs
index d0da5476bfe..e606f081c6c 100644
--- a/components/style/properties/longhand/box.mako.rs
+++ b/components/style/properties/longhand/box.mako.rs
@@ -205,6 +205,8 @@ ${helpers.single_keyword("-servo-overflow-clip-box", "padding-box content-box",
%>
// FIXME(pcwalton, #2742): Implement scrolling for `scroll` and `auto`.
+//
+// We allow it to apply to placeholders for UA sheets, which set it !important.
${helpers.single_keyword("overflow-x", "visible hidden scroll auto",
animation_value_type="discrete",
extra_gecko_values="-moz-hidden-unscrollable",
@@ -215,6 +217,8 @@ ${helpers.single_keyword("overflow-x", "visible hidden scroll auto",
servo_restyle_damage = "reflow")}
// FIXME(pcwalton, #2742): Implement scrolling for `scroll` and `auto`.
+//
+// We allow it to apply to placeholders for UA sheets, which set it !important.
<%helpers:longhand name="overflow-y" animation_value_type="discrete"
flags="APPLIES_TO_PLACEHOLDER",
spec="https://drafts.csswg.org/css-overflow/#propdef-overflow-y"