From 008b9c80093f8e80b41ca04a983e94dd01e217bb Mon Sep 17 00:00:00 2001
From: puneetdixit200 <236133619+puneetdixit200@users.noreply.github.com>
Date: Fri, 22 May 2026 13:30:24 +0530
Subject: [PATCH 1/2] Detach non-wait PowerShell launches

---
 index.js |  1 +
 test.js  | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/index.js b/index.js
index ada71e5..20f6944 100644
--- a/index.js
+++ b/index.js
@@ -207,6 +207,7 @@ const baseOpen = async options => {
 		if (!options.wait) {
 			// PowerShell will keep the parent process alive unless stdio is ignored.
 			childProcessOptions.stdio = 'ignore';
+			childProcessOptions.detached = true;
 		}
 	} else {
 		if (app) {
diff --git a/test.js b/test.js
index 500b301..e8cd867 100644
--- a/test.js
+++ b/test.js
@@ -139,6 +139,47 @@ test('subprocess is spawned before promise resolves', async t => {
 	t.true(childProcess.pid !== undefined && childProcess.pid !== null);
 });
 
+test.serial('detaches PowerShell launches when not waiting on Windows', async t => {
+	const originalPlatform = Object.getOwnPropertyDescriptor(process, 'platform');
+	const originalSpawn = childProcess.spawn;
+
+	t.teardown(() => {
+		Object.defineProperty(process, 'platform', originalPlatform);
+		childProcess.spawn = originalSpawn;
+	});
+
+	Object.defineProperty(process, 'platform', {value: 'win32'});
+
+	let childProcessOptions;
+	let unrefCalled = false;
+
+	childProcess.spawn = (...arguments_) => {
+		childProcessOptions = arguments_[2];
+
+		// eslint-disable-next-line unicorn/prefer-event-target
+		const fakeChild = new EventEmitter();
+		fakeChild.unref = () => {
+			unrefCalled = true;
+		};
+
+		setImmediate(() => {
+			fakeChild.emit('spawn');
+		});
+
+		return fakeChild;
+	};
+
+	const {default: windowsOpen} = await import(`./index.js?windows-detach=${Date.now()}`);
+	await windowsOpen('C:/coverage/index.html');
+
+	t.like(childProcessOptions, {
+		windowsVerbatimArguments: true,
+		stdio: 'ignore',
+		detached: true,
+	});
+	t.true(unrefCalled);
+});
+
 test.serial('app launches resolve before close without fallback', async t => {
 	const originalSpawn = childProcess.spawn;
 	t.teardown(() => {

From 6b71ed215b074a0f1381bddaed750ed3d84cea74 Mon Sep 17 00:00:00 2001
From: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>
Date: Sat, 23 May 2026 01:38:51 +0530
Subject: [PATCH 2/2] Fix hidden detached PowerShell windows

Set windowsHide when detaching non-wait PowerShell launches on Windows, and assert the spawn option in the Windows regression test.
---
 index.js | 1 +
 test.js  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/index.js b/index.js
index 20f6944..bde547f 100644
--- a/index.js
+++ b/index.js
@@ -208,6 +208,7 @@ const baseOpen = async options => {
 			// PowerShell will keep the parent process alive unless stdio is ignored.
 			childProcessOptions.stdio = 'ignore';
 			childProcessOptions.detached = true;
+			childProcessOptions.windowsHide = true;
 		}
 	} else {
 		if (app) {
diff --git a/test.js b/test.js
index e8cd867..384cfd2 100644
--- a/test.js
+++ b/test.js
@@ -176,6 +176,7 @@ test.serial('detaches PowerShell launches when not waiting on Windows', async t
 		windowsVerbatimArguments: true,
 		stdio: 'ignore',
 		detached: true,
+		windowsHide: true,
 	});
 	t.true(unrefCalled);
 });