From 6eb1f1cb21fff901571565f9e30dc2ed69ca66a4 Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Thu, 11 Dec 2025 13:09:42 -0800
Subject: [PATCH 1/2] Revert "ES2020: fix String.prototype.matchAll type and
 description (#62873)"

This reverts commit bbb5322c96e5d98fbdd50ac16ef7967e1560c92a.
---
 src/lib/es2020.string.d.ts                     | 6 +++---
 tests/baselines/reference/stringMatchAll.types | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/lib/es2020.string.d.ts b/src/lib/es2020.string.d.ts
index 58ae8fe75ccee..fd8ce55f1405d 100644
--- a/src/lib/es2020.string.d.ts
+++ b/src/lib/es2020.string.d.ts
@@ -4,11 +4,11 @@
 
 interface String {
     /**
-     * Matches a string with a regular expression or string, and returns an iterable of matches
+     * Matches a string with a regular expression, and returns an iterable of matches
      * containing the results of that search.
-     * @param regexp A regular expression or string literal with which to search the string
+     * @param regexp A variable name or string literal containing the regular expression pattern and flags.
      */
-    matchAll(regexp: RegExp | string): RegExpStringIterator<RegExpExecArray>;
+    matchAll(regexp: RegExp): RegExpStringIterator<RegExpExecArray>;
 
     /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
     toLocaleLowerCase(locales?: Intl.LocalesArgument): string;
diff --git a/tests/baselines/reference/stringMatchAll.types b/tests/baselines/reference/stringMatchAll.types
index 9321c24b18458..0de59f913a9a2 100644
--- a/tests/baselines/reference/stringMatchAll.types
+++ b/tests/baselines/reference/stringMatchAll.types
@@ -6,12 +6,12 @@ const matches = "matchAll".matchAll(/\w/g);
 >        : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 >"matchAll".matchAll(/\w/g) : RegExpStringIterator<RegExpExecArray>
 >                           : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
->"matchAll".matchAll : (regexp: RegExp | string) => RegExpStringIterator<RegExpExecArray>
->                    : ^      ^^               ^^^^^                                     
+>"matchAll".matchAll : (regexp: RegExp) => RegExpStringIterator<RegExpExecArray>
+>                    : ^      ^^      ^^^^^                                     
 >"matchAll" : "matchAll"
 >           : ^^^^^^^^^^
->matchAll : (regexp: RegExp | string) => RegExpStringIterator<RegExpExecArray>
->         : ^      ^^               ^^^^^                                     
+>matchAll : (regexp: RegExp) => RegExpStringIterator<RegExpExecArray>
+>         : ^      ^^      ^^^^^                                     
 >/\w/g : RegExp
 >      : ^^^^^^
 

From 88b2c84d11ec9529a999de8f4b664dc3e02a4f68 Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Thu, 11 Dec 2025 13:59:19 -0800
Subject: [PATCH 2/2] Apply suggestion from @jakebailey

---
 src/lib/es2020.string.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/es2020.string.d.ts b/src/lib/es2020.string.d.ts
index fd8ce55f1405d..a19435e6ab996 100644
--- a/src/lib/es2020.string.d.ts
+++ b/src/lib/es2020.string.d.ts
@@ -6,7 +6,7 @@ interface String {
     /**
      * Matches a string with a regular expression, and returns an iterable of matches
      * containing the results of that search.
-     * @param regexp A variable name or string literal containing the regular expression pattern and flags.
+     * @param regexp A regular expression
      */
     matchAll(regexp: RegExp): RegExpStringIterator<RegExpExecArray>;