From 630ba66d91a2cb38903c09f88ad5e407e35ada16 Mon Sep 17 00:00:00 2001
From: Ayan Khan <khanayan_123@hotmail.com>
Date: Fri, 1 Dec 2023 13:15:10 -0500
Subject: [PATCH] make changes

---
 hook.js                                                  | 9 +++++++--
 ...ic-import-assert.mjs => v18-static-import-assert.mjs} | 0
 2 files changed, 7 insertions(+), 2 deletions(-)
 rename test/hook/{v16-static-import-assert.mjs => v18-static-import-assert.mjs} (100%)

diff --git a/hook.js b/hook.js
index 0ec34a4..4c887bf 100644
--- a/hook.js
+++ b/hook.js
@@ -11,6 +11,7 @@ const isWin = process.platform === "win32"
 // FIXME: Typescript extensions are added temporarily until we find a better
 // way of supporting arbitrary extensions
 const EXTENSION_RE = /\.(js|mjs|cjs|ts|mts|cts)$/
+const EXTENSION_MJS_RE = /\.mjs$/;
 const NODE_VERSION = process.versions.node.split('.')
 const NODE_MAJOR = Number(NODE_VERSION[0])
 const NODE_MINOR = Number(NODE_VERSION[1])
@@ -110,10 +111,14 @@ function createHook (meta) {
     ) {
       return url
     }
-
+    
+    // on Node 16.12.0, url.format is undefined for .mjs files, so explicitly set it to 'module'
+    if (url.format === undefined && EXTENSION_MJS_RE.test(url.url)) {
+      url.format = 'module'
+    }
 
     specifiers.set(url.url, specifier)
-    
+
     return {
       url: url.format !== 'module' || NODE_MAJOR < 16 ? addIitm(url.url) : url.url,
       shortCircuit: true,
diff --git a/test/hook/v16-static-import-assert.mjs b/test/hook/v18-static-import-assert.mjs
similarity index 100%
rename from test/hook/v16-static-import-assert.mjs
rename to test/hook/v18-static-import-assert.mjs