doc: fix module customization hook examples

When running these examples, `node` fails to return as this `MessagePort` keeps the event loop active in the main thread unless it is `unref()`ed. Fixes: #52846 PR-URL: #53637 Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Chemi Atlow <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Moshe Atlow <[email protected]> Reviewed-By: Ulises Gascón <[email protected]>
nodejs · Jul 12, 2024 · 131639a · 131639a
1 parent 53e2d68
commit 131639a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/doc/api/module.md b/doc/api/module.md
@@ -327,6 +327,7 @@ const { port1, port2 } = new MessageChannel();
 port1.on('message', (msg) => {
   console.log(msg);
 });
+port1.unref();
 
 register('./my-hooks.mjs', {
   parentURL: import.meta.url,
@@ -347,6 +348,7 @@ const { port1, port2 } = new MessageChannel();
 port1.on('message', (msg) => {
   console.log(msg);
 });
+port1.unref();
 
 register('./my-hooks.mjs', {
   parentURL: pathToFileURL(__filename),
@@ -439,6 +441,7 @@ const { port1, port2 } = new MessageChannel();
 port1.on('message', (msg) => {
   assert.strictEqual(msg, 'increment: 2');
 });
+port1.unref();
 
 register('./path-to-my-hooks.js', {
   parentURL: import.meta.url,
@@ -461,6 +464,7 @@ const { port1, port2 } = new MessageChannel();
 port1.on('message', (msg) => {
   assert.strictEqual(msg, 'increment: 2');
 });
+port1.unref();
 
 register('./path-to-my-hooks.js', {
   parentURL: pathToFileURL(__filename),