From a5200306f93a4029fb45ba948fa2a7d28847f17f Mon Sep 17 00:00:00 2001
From: Slava Fomin II <slava@fomin.io>
Date: Mon, 19 Aug 2019 21:17:00 +0300
Subject: [PATCH] Extended "overrideBrowserslist" option to support environment
 maps (#37642)

---
 types/autoprefixer/autoprefixer-tests.ts | 19 ++++++++++++++++++-
 types/autoprefixer/index.d.ts            |  8 ++++++--
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/types/autoprefixer/autoprefixer-tests.ts b/types/autoprefixer/autoprefixer-tests.ts
index f3585fe30d..c8581b8da8 100644
--- a/types/autoprefixer/autoprefixer-tests.ts
+++ b/types/autoprefixer/autoprefixer-tests.ts
@@ -16,5 +16,22 @@ const ap2: Transformer = autoprefixer({
     flexbox: true,
     grid: false,
     stats: {},
-    ignoreUnknownVersions: false
+    ignoreUnknownVersions: false,
+});
+
+// Using environment map in "overrideBrowserslist"
+const ap3: Transformer = autoprefixer({
+    overrideBrowserslist: {
+        production: [
+            '> 1%',
+            'ie 10',
+        ],
+        modern: [
+            'last 1 chrome version',
+            'last 1 firefox version',
+        ],
+        ssr: [
+            'node 12',
+        ],
+    },
 });
diff --git a/types/autoprefixer/index.d.ts b/types/autoprefixer/index.d.ts
index f689168751..95b0d99e9e 100644
--- a/types/autoprefixer/index.d.ts
+++ b/types/autoprefixer/index.d.ts
@@ -1,6 +1,8 @@
 // Type definitions for autoprefixer 9.6
 // Project: https://github.com/postcss/autoprefixer
-// Definitions by:  Armando Meziat <https://github.com/odnamrataizem>, murt <https://github.com/murt>
+// Definitions by: Armando Meziat <https://github.com/odnamrataizem>
+//                 murt <https://github.com/murt>
+//                 Slava Fomin II <https://github.com/slavafomin>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.7
 
@@ -8,6 +10,8 @@ import { Plugin } from 'postcss';
 import { Stats } from 'browserslist';
 
 declare namespace autoprefixer {
+    type BrowserslistTarget = (string | string[] | { [key: string]: string[]; });
+
     interface Options {
         env?: string;
         cascade?: boolean;
@@ -18,7 +22,7 @@ declare namespace autoprefixer {
         grid?: false | 'autoplace' | 'no-autoplace';
         stats?: Stats;
         browsers?: string[] | string;
-        overrideBrowserslist?: string[] | string;
+        overrideBrowserslist?: BrowserslistTarget;
         ignoreUnknownVersions?: boolean;
     }