lib: make structuredClone spec compliant

Fixes: #40246 PR-URL: #40251 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
nodejs · Oct 5, 2021 · 1ccecf4 · 1ccecf4
1 parent 6d4e14d
commit 1ccecf4
Showing 1 changed file with 21 additions and 0 deletions.
diff --git a/lib/internal/structured_clone.js b/lib/internal/structured_clone.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const {
+  MessageChannel,
+  receiveMessageOnPort,
+} = require('internal/worker/io');
+
+let channel;
+function structuredClone(value, options = undefined) {
+  // TODO: Improve this with a more efficient solution that avoids
+  // instantiating a MessageChannel
+  channel ??= new MessageChannel();
+  channel.port1.unref();
+  channel.port2.unref();
+  channel.port1.postMessage(value, options?.transfer);
+  return receiveMessageOnPort(channel.port2).message;
+}
+
+module.exports = {
+  structuredClone
+};