buffer: do not emit deprecation notice on Buffer.of

PR-URL: https://github.com/nodejs/node/pull/19682
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/buffer.js b/lib/buffer.js
index 753b16933c..1fbfb756f0 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -236,6 +236,20 @@ Buffer.from = function from(value, encodingOrOffset, length) {
   );
 };
 
+// Identical to the built-in %TypedArray%.of(), but avoids using the deprecated
+// Buffer() constructor. Must use arrow function syntax to avoid automatically
+// adding a `prototype` property and making the function a constructor.
+//
+// Refs: https://tc39.github.io/ecma262/#sec-%typedarray%.of
+// Refs: https://esdiscuss.org/topic/isconstructor#content-11
+const of = (...items) => {
+  const newObj = createUnsafeBuffer(items.length);
+  for (var k = 0; k < items.length; k++)
+    newObj[k] = items[k];
+  return newObj;
+};
+Buffer.of = of;
+
 Object.setPrototypeOf(Buffer, Uint8Array);
 
 // The 'assertSize' method will remove itself from the callstack when an error