From 43461ff536aa24a1f1a7cc370cb2498a0d448293 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Oct 2018 22:14:44 +0300
Subject: [PATCH 1/4] Update utils.js

---
 lib/utils.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/utils.js b/lib/utils.js
index 8946055dac..49b4cd1a1a 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,7 +1,6 @@
 'use strict';
 
 var bind = require('./helpers/bind');
-var isBuffer = require('is-buffer');
 
 /*global toString:true*/
 
@@ -19,6 +18,17 @@ function isArray(val) {
   return toString.call(val) === '[object Array]';
 }
 
+
+/**
+ * Determine if a value is a Buffer
+ *
+ * @param {Object} val The value to test
+ * @returns {boolean} True if value is a Buffer, otherwise false
+ */
+function isBuffer(val) {
+  return ![, null].includes(val) && val.constructor === Buffer;
+}
+
 /**
  * Determine if a value is an ArrayBuffer
  *

From d483bd4135faf63d680431496098e978d3d87db6 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Oct 2018 22:15:25 +0300
Subject: [PATCH 2/4] Remove dependency on is-buffer from package.json

---
 package.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 2229ce19f8..37f6d8a59a 100644
--- a/package.json
+++ b/package.json
@@ -73,8 +73,7 @@
   },
   "typings": "./index.d.ts",
   "dependencies": {
-    "follow-redirects": "^1.4.1",
-    "is-buffer": "^2.0.2"
+    "follow-redirects": "^1.4.1"
   },
   "bundlesize": [
     {

From 9a6c53821db7ed0050ac92cadb48a8a47858457e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Oct 2018 22:22:19 +0300
Subject: [PATCH 3/4] Update utils.js

---
 lib/utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/utils.js b/lib/utils.js
index 49b4cd1a1a..c985b0a954 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -26,7 +26,7 @@ function isArray(val) {
  * @returns {boolean} True if value is a Buffer, otherwise false
  */
 function isBuffer(val) {
-  return ![, null].includes(val) && val.constructor === Buffer;
+  return ![undefined, null].includes(val) && val.constructor === Buffer;
 }
 
 /**

From ef01eefc16ff2e41c2c4845306f04060b62907ca Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Nov 2019 12:51:29 +0200
Subject: [PATCH 4/4] Update isX.spec.js

---
 test/specs/utils/isX.spec.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/specs/utils/isX.spec.js b/test/specs/utils/isX.spec.js
index 08fa2c4462..2d301c730d 100644
--- a/test/specs/utils/isX.spec.js
+++ b/test/specs/utils/isX.spec.js
@@ -7,6 +7,12 @@ describe('utils::isX', function () {
     expect(utils.isArray({length: 5})).toEqual(false);
   });
 
+  it('should validate Buffer', function () {
+    expect(utils.isBuffer(Buffer.from('a'))).toEqual(true);
+    expect(utils.isBuffer(null)).toEqual(false);
+    expect(utils.isBuffer(undefined)).toEqual(false);
+  });
+
   it('should validate ArrayBuffer', function () {
     expect(utils.isArrayBuffer(new ArrayBuffer(2))).toEqual(true);
     expect(utils.isArrayBuffer({})).toEqual(false);