diff --git a/src/js/node/assert.js b/src/js/node/assert.ts
similarity index 99%
rename from src/js/node/assert.js
rename to src/js/node/assert.ts
index 33f58a9e50d28c..f2445c83da7bb9 100644
--- a/src/js/node/assert.js
+++ b/src/js/node/assert.ts
@@ -2,7 +2,7 @@
 const util = require("node:util");
 
 var isDeepEqual = Bun.deepEquals;
-var __commonJS = (cb, mod) =>
+var __commonJS = (cb, mod: typeof module | undefined = undefined) =>
   function () {
     return mod || (0, cb[Object.keys(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
   };
diff --git a/src/js/node/child_process.js b/src/js/node/child_process.ts
similarity index 100%
rename from src/js/node/child_process.js
rename to src/js/node/child_process.ts
diff --git a/src/js/node/crypto.js b/src/js/node/crypto.ts
similarity index 99%
rename from src/js/node/crypto.js
rename to src/js/node/crypto.ts
index 2009b0a4ae06dc..83e0355a2599a8 100644
--- a/src/js/node/crypto.js
+++ b/src/js/node/crypto.ts
@@ -78,7 +78,7 @@ function getArrayBufferOrView(buffer, name, encoding) {
 const crypto = globalThis.crypto;
 const globalCrypto = crypto;
 
-var __commonJS = (cb, mod) =>
+var __commonJS = (cb, mod: typeof module | undefined = undefined) =>
   function () {
     return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
   };
diff --git a/src/js/node/diagnostics_channel.js b/src/js/node/diagnostics_channel.ts
similarity index 100%
rename from src/js/node/diagnostics_channel.js
rename to src/js/node/diagnostics_channel.ts
diff --git a/src/js/node/dns.js b/src/js/node/dns.ts
similarity index 100%
rename from src/js/node/dns.js
rename to src/js/node/dns.ts
diff --git a/src/js/node/events.js b/src/js/node/events.ts
similarity index 100%
rename from src/js/node/events.js
rename to src/js/node/events.ts
diff --git a/src/js/node/fs.js b/src/js/node/fs.ts
similarity index 100%
rename from src/js/node/fs.js
rename to src/js/node/fs.ts
diff --git a/src/js/node/net.js b/src/js/node/net.ts
similarity index 100%
rename from src/js/node/net.js
rename to src/js/node/net.ts
diff --git a/src/js/node/punycode.js b/src/js/node/punycode.ts
similarity index 100%
rename from src/js/node/punycode.js
rename to src/js/node/punycode.ts
diff --git a/src/js/node/querystring.js b/src/js/node/querystring.ts
similarity index 98%
rename from src/js/node/querystring.js
rename to src/js/node/querystring.ts
index d7104cfcda659c..73a9a0ac15a72a 100644
--- a/src/js/node/querystring.js
+++ b/src/js/node/querystring.ts
@@ -1,4 +1,6 @@
-var __commonJS = (cb, mod) => () => (mod || cb((mod = { exports: {} }).exports, mod), mod.exports);
+var __commonJS =
+  (cb, mod: typeof module | undefined = undefined) =>
+  () => (mod || cb((mod = { exports: {} }).exports, mod), mod.exports);
 
 var Buffer = require("node:buffer").Buffer;
 
diff --git a/src/js/node/readline.js b/src/js/node/readline.ts
similarity index 100%
rename from src/js/node/readline.js
rename to src/js/node/readline.ts
diff --git a/src/js/node/stream.consumers.js b/src/js/node/stream.consumers.ts
similarity index 100%
rename from src/js/node/stream.consumers.js
rename to src/js/node/stream.consumers.ts
diff --git a/src/js/node/stream.js b/src/js/node/stream.ts
similarity index 99%
rename from src/js/node/stream.js
rename to src/js/node/stream.ts
index 245b77eac2a03b..58967763c6ac35 100644
--- a/src/js/node/stream.js
+++ b/src/js/node/stream.ts
@@ -16,7 +16,7 @@ const {
 
 var __getOwnPropNames = Object.getOwnPropertyNames;
 
-var __commonJS = (cb, mod) =>
+var __commonJS = (cb, mod: typeof module | undefined = undefined) =>
   function __require2() {
     return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
   };
diff --git a/src/js/node/stream.web.js b/src/js/node/stream.web.ts
similarity index 100%
rename from src/js/node/stream.web.js
rename to src/js/node/stream.web.ts
diff --git a/src/js/node/timers.promises.js b/src/js/node/timers.promises.ts
similarity index 100%
rename from src/js/node/timers.promises.js
rename to src/js/node/timers.promises.ts
diff --git a/src/js/node/timers.js b/src/js/node/timers.ts
similarity index 100%
rename from src/js/node/timers.js
rename to src/js/node/timers.ts
diff --git a/src/js/node/tls.js b/src/js/node/tls.ts
similarity index 100%
rename from src/js/node/tls.js
rename to src/js/node/tls.ts
diff --git a/src/js/node/url.js b/src/js/node/url.ts
similarity index 100%
rename from src/js/node/url.js
rename to src/js/node/url.ts
diff --git a/src/js/node/util.js b/src/js/node/util.ts
similarity index 100%
rename from src/js/node/util.js
rename to src/js/node/util.ts
diff --git a/src/js/node/wasi.js b/src/js/node/wasi.ts
similarity index 99%
rename from src/js/node/wasi.js
rename to src/js/node/wasi.ts
index 53a74483337576..23c8bfac013758 100644
--- a/src/js/node/wasi.js
+++ b/src/js/node/wasi.ts
@@ -10,7 +10,7 @@ const nodeFsConstants = $processBindingConstants.fs;
 
 var __getOwnPropNames = Object.getOwnPropertyNames;
 
-var __commonJS = (cb, mod) =>
+var __commonJS = (cb, mod: typeof module | undefined = undefined) =>
   function __require2() {
     return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
   };
diff --git a/src/js/node/zlib.js b/src/js/node/zlib.ts
similarity index 99%
rename from src/js/node/zlib.js
rename to src/js/node/zlib.ts
index de1260d0ed575f..938ad6b82a7c60 100644
--- a/src/js/node/zlib.js
+++ b/src/js/node/zlib.ts
@@ -10,7 +10,7 @@ const Util = require("node:util");
 const { isAnyArrayBuffer, isArrayBufferView } = require("node:util/types");
 
 var __getOwnPropNames = Object.getOwnPropertyNames;
-var __commonJS = (cb, mod) =>
+var __commonJS = (cb, mod: typeof module | undefined = undefined) =>
   function __require() {
     return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
   };