css: remove duplicate rules

evanw · May 6, 2021 · ad37a7b · ad37a7b
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -66,6 +66,8 @@
 
     * The four special pseudo-elements `::before`, `::after`, `::first-line`, and `::first-letter` are allowed to be parsed with one `:` for legacy reasons, so the `::` is now converted to `:` for these pseudo-elements.
 
+    * Duplicate CSS rules are now deduplicated. Only the last rule is kept, since that's the only one that has any effect. This applies for both top-level rules and nested rules.
+
 ## 0.11.18
 
 * Add support for OpenBSD on x86-64 ([#1235](https://github.com/evanw/esbuild/issues/1235))