From 8a8af47593517ddd05e1ad57e8912b0fd1c04176 Mon Sep 17 00:00:00 2001
From: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
Date: Tue, 29 Jul 2025 10:02:40 +0200
Subject: [PATCH 1/5] doc: update deprecation guide for `util.is**()`

---
 doc/api/deprecations.md | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index a111b3a0d6ce4e..4e2610b3cf03cc 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -1109,9 +1109,7 @@ changes:
 
 Type: End-of-Life
 
-The `util.isError()` API has been removed. Please use
-`Object.prototype.toString(arg) === '[object Error]' || arg instanceof Error`
-instead.
+The `util.isError()` API has been removed. Please use `Error.isError(arg)`.
 
 ### DEP0049: `util.isFunction()`
 
@@ -1192,7 +1190,7 @@ changes:
 Type: End-of-Life
 
 The `util.isNullOrUndefined()` API has been removed. Please use
-`arg === null || arg === undefined` instead.
+`arg === null` instead.
 
 ### DEP0052: `util.isNumber()`
 

From fa06eeb08acf449c1b5ec7a243bca6b26e0e950a Mon Sep 17 00:00:00 2001
From: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
Date: Tue, 29 Jul 2025 19:28:02 +0200
Subject: [PATCH 2/5] fix: null & undifined

Co-authored-by: James M Snell <jasnell@gmail.com>
---
 doc/api/deprecations.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index 4e2610b3cf03cc..e1ebbb4af61dbe 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -1190,7 +1190,7 @@ changes:
 Type: End-of-Life
 
 The `util.isNullOrUndefined()` API has been removed. Please use
-`arg === null` instead.
+`arg == null` instead.
 
 ### DEP0052: `util.isNumber()`
 

From 2e80adfcee858102506639f59b0094fa0b29ed4c Mon Sep 17 00:00:00 2001
From: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
Date: Tue, 29 Jul 2025 21:41:08 +0200
Subject: [PATCH 3/5] better handling

---
 doc/api/deprecations.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index 4e2610b3cf03cc..66812e6b873294 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -1085,6 +1085,9 @@ Type: End-of-Life
 The `util.isDate()` API has been removed. Please use
 `arg instanceof Date` instead.
 
+Also for stronger approaches, consider using:
+`Date.prototype.toString.call(arg) === '[object Date]' && !isNaN(arg)` It's also can be used in a `try/catch` block to catch invalid date objects.
+
 ### DEP0048: `util.isError()`
 
 <!-- YAML
@@ -1270,9 +1273,7 @@ changes:
 
 Type: End-of-Life
 
-The `util.isPrimitive()` API has been removed. Please use
-`arg === null || (typeof arg !=='object' && typeof arg !== 'function')`
-instead.
+The `util.isPrimitive()` API has been removed. Please use `Object(arg) !== arg` instead.
 
 ### DEP0055: `util.isRegExp()`
 

From 19adb3d848a170f1413914f66fd7c75d44ac18e7 Mon Sep 17 00:00:00 2001
From: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
Date: Tue, 29 Jul 2025 21:43:39 +0200
Subject: [PATCH 4/5] fix lint

---
 doc/api/deprecations.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index 94889662463f94..da7fabf09b4f86 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -1086,7 +1086,8 @@ The `util.isDate()` API has been removed. Please use
 `arg instanceof Date` instead.
 
 Also for stronger approaches, consider using:
-`Date.prototype.toString.call(arg) === '[object Date]' && !isNaN(arg)` It's also can be used in a `try/catch` block to catch invalid date objects.
+`Date.prototype.toString.call(arg) === '[object Date]' && !isNaN(arg)`.
+This can also be used in a `try/catch` block to handle invalid date objects.
 
 ### DEP0048: `util.isError()`
 

From 1175038f72a132a754e75929d9cdf1a40d8a83d3 Mon Sep 17 00:00:00 2001
From: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
Date: Wed, 27 Aug 2025 23:31:55 +0200
Subject: [PATCH 5/5] revert useless change

---
 doc/api/deprecations.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index da7fabf09b4f86..75ac002a3a9069 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -1194,7 +1194,7 @@ changes:
 Type: End-of-Life
 
 The `util.isNullOrUndefined()` API has been removed. Please use
-`arg == null` instead.
+`arg === null || arg === undefined` instead.
 
 ### DEP0052: `util.isNumber()`