From 6b9daf0b00c72232a0b455262538985f0ca75fe0 Mon Sep 17 00:00:00 2001
From: isaacs <i@izs.me>
Date: Sat, 6 May 2023 21:20:42 -0700
Subject: [PATCH] loader: return empty globalPreload when not using off-thread
 loader

---
 esm.mjs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/esm.mjs b/esm.mjs
index d5139c1aa..e2c41d3b6 100644
--- a/esm.mjs
+++ b/esm.mjs
@@ -1,5 +1,6 @@
 import { fileURLToPath } from 'url';
 import { createRequire } from 'module';
+import { versionGteLt } from './dist/util.js';
 const require = createRequire(fileURLToPath(import.meta.url));
 
 /** @type {import('./dist/esm')} */
@@ -7,7 +8,11 @@ const esm = require('./dist/esm');
 export const { resolve, load, getFormat, transformSource } = esm.registerAndCreateEsmHooks();
 
 // Affordance for node 20, where load() happens in an isolated thread
+const offThreadLoader = versionGteLt(process.versions.node, '20.0.0');
 export const globalPreload = () => {
+  if (!offThreadLoader) {
+    return '';
+  }
   const self = fileURLToPath(import.meta.url);
   return `
 const { createRequire } = getBuiltin('module');