fix: jsonrpc error instanceof

fixes #209
open-rpc · Dec 17, 2020 · c85f501 · c85f501
1 parent 7c7c34d
commit c85f501
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diff --git a/src/Error.test.ts b/src/Error.test.ts
@@ -16,4 +16,9 @@ describe("Error test", () => {
     const err2 = new JSONRPCError("test", 9999, "testdata");
   });
 
+  it("should be able to use instanceof", () => {
+    const err = new JSONRPCError("test", 9999);
+    expect(err instanceof JSONRPCError).toBe(true);
+  });
+
 });
diff --git a/src/Error.ts b/src/Error.ts
@@ -11,6 +11,7 @@ export class JSONRPCError extends Error {
     this.message = message;
     this.code = code;
     this.data = data;
+    Object.setPrototypeOf(this, new.target.prototype); // restore prototype chain: see https://github.com/open-rpc/client-js/issues/209
   }
 }