use Object.setPrototypeOf instead of __proto__

index.js

@@ -46,7 +46,9 @@ function typedArraySupport () {
   // Can typed array instances can be augmented?
   try {
     var arr = new Uint8Array(1)
-    arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
+    var proto = { foo: function () { return 42 } }
+    Object.setPrototypeOf(proto, Uint8Array.prototype)
+    Object.setPrototypeOf(arr, proto)
     return arr.foo() === 42
   } catch (e) {
     return false
@@ -75,7 +77,7 @@ function createBuffer (length) {
   }
   // Return an augmented `Uint8Array` instance
   var buf = new Uint8Array(length)
-  buf.__proto__ = Buffer.prototype
+  Object.setPrototypeOf(buf, Buffer.prototype)
   return buf
 }
 
@@ -177,8 +179,8 @@ Buffer.from = function (value, encodingOrOffset, length) {
 
 // Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
 // https://github.com/feross/buffer/pull/148
-Buffer.prototype.__proto__ = Uint8Array.prototype
-Buffer.__proto__ = Uint8Array
+Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
+Object.setPrototypeOf(Buffer, Uint8Array)
 
 function assertSize (size) {
   if (typeof size !== 'number') {
@@ -282,7 +284,8 @@ function fromArrayBuffer (array, byteOffset, length) {
   }
 
   // Return an augmented `Uint8Array` instance
-  buf.__proto__ = Buffer.prototype
+  Object.setPrototypeOf(buf, Buffer.prototype)
+
   return buf
 }
 
@@ -1095,7 +1098,8 @@ Buffer.prototype.slice = function slice (start, end) {
 
   var newBuf = this.subarray(start, end)
   // Return an augmented `Uint8Array` instance
-  newBuf.__proto__ = Buffer.prototype
+  Object.setPrototypeOf(newBuf, Buffer.prototype)
+
   return newBuf
 }