fix: add setPrototypeOf polyfill (#2127)

Author: lext-7

packages/utils/src/error.ts

@@ -1,3 +1,5 @@
+import { setPrototypeOf } from './polyfill';
+
 /** An error emitted by Sentry SDKs and related utilities. */
 export class SentryError extends Error {
   /** Display name of this error instance. */
@@ -8,6 +10,6 @@ export class SentryError extends Error {
 
     // tslint:disable:no-unsafe-any
     this.name = new.target.prototype.constructor.name;
-    Object.setPrototypeOf(this, new.target.prototype);
+    setPrototypeOf(this, new.target.prototype);
   }
 }

packages/utils/src/polyfill.ts

@@ -0,0 +1,25 @@
+export const setPrototypeOf =
+  Object.setPrototypeOf || ({ __proto__: [] } instanceof Array ? setProtoOf : mixinProperties);
+
+/**
+ * setPrototypeOf polyfill using __proto__
+ */
+function setProtoOf<TTarget extends object, TProto>(obj: TTarget, proto: TProto): TTarget & TProto {
+  // @ts-ignore
+  obj.__proto__ = proto;
+  return obj as TTarget & TProto;
+}
+
+/**
+ * setPrototypeOf polyfill using mixin
+ */
+function mixinProperties<TTarget extends object, TProto>(obj: TTarget, proto: TProto): TTarget & TProto {
+  for (const prop in proto) {
+    if (!obj.hasOwnProperty(prop)) {
+      // @ts-ignore
+      obj[prop] = proto[prop];
+    }
+  }
+
+  return obj as TTarget & TProto;
+}