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-rw-r--r--servo/components/style/properties/longhands/ui.mako.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/servo/components/style/properties/longhands/ui.mako.rs b/servo/components/style/properties/longhands/ui.mako.rs
index 1150816ac0..58006e0d65 100644
--- a/servo/components/style/properties/longhands/ui.mako.rs
+++ b/servo/components/style/properties/longhands/ui.mako.rs
@@ -199,6 +199,20 @@ ${helpers.predefined_type(
affects="",
)}
+${helpers.predefined_type(
+ "transition-behavior",
+ "TransitionBehavior",
+ "computed::TransitionBehavior::normal()",
+ engines="gecko",
+ initial_specified_value="specified::TransitionBehavior::normal()",
+ vector=True,
+ need_index=True,
+ animation_value_type="none",
+ gecko_pref="layout.css.transition-behavior.enabled",
+ spec="https://drafts.csswg.org/css-transitions-2/#transition-behavior-property",
+ affects="",
+)}
+
<% animation_extra_prefixes = "moz:layout.css.prefixes.animations webkit" %>
${helpers.predefined_type(