From 1e3e89fe6fc5ef185710ef475e43ba0e1c42bb0f Mon Sep 17 00:00:00 2001
From: Andrew Leedham <AndrewLeedham@outlook.com>
Date: Mon, 11 Mar 2019 20:21:07 +0000
Subject: [PATCH] [@types/browserslist] Added error.d.ts to browserslist
 (#33772)

* Added error.d.ts to browserslist

* Upgrade browserslist version number

* Added type test

* Removed patch version and add space to test

* Set browserslist to always be true
---
 types/browserslist/browserslist-tests.ts | 3 +++
 types/browserslist/error.d.ts            | 6 ++++++
 types/browserslist/index.d.ts            | 3 ++-
 types/browserslist/tsconfig.json         | 2 +-
 4 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 types/browserslist/error.d.ts

diff --git a/types/browserslist/browserslist-tests.ts b/types/browserslist/browserslist-tests.ts
index d5e88e5b5d..4617fc2490 100644
--- a/types/browserslist/browserslist-tests.ts
+++ b/types/browserslist/browserslist-tests.ts
@@ -1,4 +1,5 @@
 import browserslist from "browserslist";
+import BrowserslistError from "browserslist/error";
 
 browserslist(); // $ExpectType string[]
 browserslist(""); // $ExpectType string[]
@@ -20,3 +21,5 @@ for (const opt of opts) {
 
 browserslist.coverage([""]); // $ExpectType number
 browserslist.coverage([""], { "": { "": 0 } }); // $ExpectType number
+
+new BrowserslistError('error'); // $ExpectType BrowserslistError
diff --git a/types/browserslist/error.d.ts b/types/browserslist/error.d.ts
new file mode 100644
index 0000000000..1c3e584471
--- /dev/null
+++ b/types/browserslist/error.d.ts
@@ -0,0 +1,6 @@
+declare class BrowserslistError extends Error {
+    constructor(message: any);
+    browserslist: true;
+}
+
+export = BrowserslistError;
diff --git a/types/browserslist/index.d.ts b/types/browserslist/index.d.ts
index 7c4a0add0c..8850a45129 100644
--- a/types/browserslist/index.d.ts
+++ b/types/browserslist/index.d.ts
@@ -1,6 +1,7 @@
-// Type definitions for browserslist 4.3
+// Type definitions for browserslist 4.4
 // Project: https://github.com/browserslist/browserslist#readme
 // Definitions by: Dave Cardwell <https://github.com/davecardwell>
+//                 Andrew Leedham <https://github.com/AndrewLeedham>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.7
 
diff --git a/types/browserslist/tsconfig.json b/types/browserslist/tsconfig.json
index cf68d8bf64..4dbd0e9b45 100644
--- a/types/browserslist/tsconfig.json
+++ b/types/browserslist/tsconfig.json
@@ -13,5 +13,5 @@
         "forceConsistentCasingInFileNames": true,
         "esModuleInterop": true
     },
-    "files": ["index.d.ts", "browserslist-tests.ts"]
+    "files": ["index.d.ts", "browserslist-tests.ts", "error.d.ts"]
 }