From cce3f3a286e69f58b7ff567db96e663d59f5f604 Mon Sep 17 00:00:00 2001
From: Mats Palmgren <mats@mozilla.com>
Date: Sat, 16 Oct 2021 20:09:24 +0000
Subject: [PATCH] Bug 1736129 - Make #[css(represents_keyword)] convert
 underscore in the field name to dash.  r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D128668
---
 servo/components/style_derive/to_css.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/servo/components/style_derive/to_css.rs b/servo/components/style_derive/to_css.rs
index 40b7ee7cfec8..8281a82bd893 100644
--- a/servo/components/style_derive/to_css.rs
+++ b/servo/components/style_derive/to_css.rs
@@ -203,7 +203,7 @@ fn derive_single_field_expr(
             .ident
             .as_ref()
             .expect("Unnamed field with represents_keyword?");
-        let ident = cg::to_css_identifier(&ident.to_string());
+        let ident = cg::to_css_identifier(&ident.to_string()).replace("_", "-");
         quote! {
             if *#field {
                 writer.raw_item(#ident)?;