1 files changed, 7 insertions, 0 deletions
diff --git a/ext/node/polyfills/internal/blob.mjs b/ext/node/polyfills/internal/blob.mjs
new file mode 100644
index 000000000..1b685fad4
--- /dev/null
+++ b/ext/node/polyfills/internal/blob.mjs
@@ -0,0 +1,7 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Node's implementation checks for a symbol they put in the blob prototype
+// Since the implementation of Blob is Deno's, the only option is to check the
+// objects constructor
+export function isBlob(object) {
+  return object instanceof Blob;
+}