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-rw-r--r--layout/reftests/css-required/css-required-style.css13
1 files changed, 13 insertions, 0 deletions
diff --git a/layout/reftests/css-required/css-required-style.css b/layout/reftests/css-required/css-required-style.css
new file mode 100644
index 0000000000..59daf2ea62
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+++ b/layout/reftests/css-required/css-required-style.css
@@ -0,0 +1,13 @@
+input, textarea, select, button,
+*:optional {
+ visibility: hidden;
+}
+
+*:required {
+ visibility: visible;
+}
+
+/* Override the default style. */
+:invalid {
+ box-shadow: none;
+}