diff --git a/packages/core/integration-tests/test/BundleGraph.js b/packages/core/integration-tests/test/BundleGraph.js
index f3c62e95c..7c1a1d19e 100644
--- a/packages/core/integration-tests/test/BundleGraph.js
+++ b/packages/core/integration-tests/test/BundleGraph.js
@@ -64,11 +64,11 @@ describe('BundleGraph', () => {
       },
       {
         type: 'asset',
-        value: 'bundle-url.ts',
+        value: 'bundle-url.js',
       },
       {
         type: 'asset',
-        value: 'bundle-url-common.ts',
+        value: 'bundle-url-common.js',
       },
       {
         type: 'asset',
@@ -80,11 +80,11 @@ describe('BundleGraph', () => {
       },
       {
         type: 'asset',
-        value: 'bundle-url.ts',
+        value: 'bundle-url.js',
       },
       {
         type: 'asset',
-        value: 'bundle-url-common.ts',
+        value: 'bundle-url-common.js',
       },
       {
         type: 'asset',
diff --git a/packages/core/integration-tests/test/bundle-text.js b/packages/core/integration-tests/test/bundle-text.js
index 510c4f121..c0e504d78 100644
--- a/packages/core/integration-tests/test/bundle-text.js
+++ b/packages/core/integration-tests/test/bundle-text.js
@@ -244,8 +244,8 @@ describe('bundle-text:', function () {
               : [
                   'index.js',
                   'esmodule-helpers.js',
-                  'bundle-url.ts',
-                  'bundle-url-common.ts',
+                  'bundle-url.js',
+                  'bundle-url-common.js',
                   'cacheLoader.js',
                   'js-loader.js',
                 ],
diff --git a/packages/core/integration-tests/test/bundler.js b/packages/core/integration-tests/test/bundler.js
index bc3099a11..905d0c500 100644
--- a/packages/core/integration-tests/test/bundler.js
+++ b/packages/core/integration-tests/test/bundler.js
@@ -70,8 +70,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -160,8 +160,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -255,8 +255,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -347,8 +347,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -466,8 +466,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -545,8 +545,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -624,8 +624,8 @@ describe('bundler', function () {
           assets: [
             'inline-module.js',
             'local.html',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -655,8 +655,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -708,8 +708,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -760,8 +760,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -815,8 +815,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -869,8 +869,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -945,7 +945,7 @@ describe('bundler', function () {
         ],
       },
       {
-        assets: ['bundle-manifest.js', 'bundle-url.ts', 'bundle-url-common.ts'], // manifest bundle
+        assets: ['bundle-manifest.js', 'bundle-url.js', 'bundle-url-common.js'], // manifest bundle
       },
       {
         assets: [
@@ -957,7 +957,7 @@ describe('bundler', function () {
         ],
       },
       {
-        assets: ['bundle-manifest.js', 'bundle-url.ts', 'bundle-url-common.ts'], // manifest bundle
+        assets: ['bundle-manifest.js', 'bundle-url.js', 'bundle-url-common.js'], // manifest bundle
       },
       {
         assets: ['c.js'],
@@ -1013,8 +1013,8 @@ describe('bundler', function () {
         assets: [
           'a.js',
           'b.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -1085,8 +1085,8 @@ describe('bundler', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -1428,8 +1428,8 @@ describe('bundler', function () {
         {
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'css-loader.js',
             'esmodule-helpers.js',
@@ -1596,8 +1596,8 @@ describe('bundler', function () {
         {
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'css-loader.js',
             'esmodule-helpers.js',
@@ -1898,8 +1898,8 @@ describe('bundler', function () {
           {
             assets: [
               'bundle-manifest.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -1976,8 +1976,8 @@ describe('bundler', function () {
           {
             assets: [
               'bundle-manifest.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -2058,8 +2058,8 @@ describe('bundler', function () {
           {
             assets: [
               'bundle-manifest.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -2347,8 +2347,8 @@ describe('bundler', function () {
           assets: [
             'a.js',
             'b.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'esmodule-helpers.js',
             'js-loader.js',
diff --git a/packages/core/integration-tests/test/cache.js b/packages/core/integration-tests/test/cache.js
index 29f7b555f..5de047e92 100644
--- a/packages/core/integration-tests/test/cache.js
+++ b/packages/core/integration-tests/test/cache.js
@@ -4998,8 +4998,8 @@ describe.v2('cache', function () {
                   assets: [
                     'index.js',
                     'c.js',
-                    'bundle-url.ts',
-                    'bundle-url-common.ts',
+                    'bundle-url.js',
+                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5037,8 +5037,8 @@ describe.v2('cache', function () {
             assets: [
               'index.js',
               'c.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'js-loader.js',
               'bundle-manifest.js',
@@ -5114,8 +5114,8 @@ describe.v2('cache', function () {
                   assets: [
                     'index.js',
                     'c.js',
-                    'bundle-url.ts',
-                    'bundle-url-common.ts',
+                    'bundle-url.js',
+                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5153,8 +5153,8 @@ describe.v2('cache', function () {
             assets: [
               'index.js',
               'c.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'js-loader.js',
               'bundle-manifest.js',
@@ -5194,8 +5194,8 @@ describe.v2('cache', function () {
                   assets: [
                     'index.js',
                     'c.js',
-                    'bundle-url.ts',
-                    'bundle-url-common.ts',
+                    'bundle-url.js',
+                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5227,8 +5227,8 @@ describe.v2('cache', function () {
             assets: [
               'index.js',
               'c.js',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'cacheLoader.js',
               'js-loader.js',
               'bundle-manifest.js',
diff --git a/packages/core/integration-tests/test/css.js b/packages/core/integration-tests/test/css.js
index 1df8f6ccf..7b7df559b 100644
--- a/packages/core/integration-tests/test/css.js
+++ b/packages/core/integration-tests/test/css.js
@@ -80,8 +80,8 @@ describe('css', () => {
         name: 'entry.js',
         type: 'js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'entry.js',
           'js-loader.js',
@@ -107,8 +107,8 @@ describe('css', () => {
         name: 'entry.js',
         type: 'js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'entry.js',
@@ -132,8 +132,8 @@ describe('css', () => {
       {
         name: 'index.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'index.js',
diff --git a/packages/core/integration-tests/test/glob.js b/packages/core/integration-tests/test/glob.js
index a41ad0a37..81f15f3b1 100644
--- a/packages/core/integration-tests/test/glob.js
+++ b/packages/core/integration-tests/test/glob.js
@@ -82,7 +82,7 @@ describe('glob', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', '*.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['index.js', '*.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         type: 'txt',
@@ -116,8 +116,8 @@ describe('glob', function () {
         assets: [
           'index.js',
           '*.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -240,8 +240,8 @@ describe('glob', function () {
           assets: [
             '*.js',
             '*.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'index.js',
             'js-loader.js',
diff --git a/packages/core/integration-tests/test/html.js b/packages/core/integration-tests/test/html.js
index d629e2d8b..b9aa70f56 100644
--- a/packages/core/integration-tests/test/html.js
+++ b/packages/core/integration-tests/test/html.js
@@ -484,8 +484,8 @@ describe('html', function () {
         type: 'js',
         assets: [
           'index.css',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'css-loader.js',
           'hmr-runtime.js',
         ],
@@ -1875,8 +1875,8 @@ describe('html', function () {
           type: 'js',
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'index.js',
             'index.js',
@@ -2209,8 +2209,8 @@ describe('html', function () {
         type: 'js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -2233,8 +2233,8 @@ describe('html', function () {
         type: 'js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -2305,8 +2305,8 @@ describe('html', function () {
           assets: [
             'a.js',
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -2315,8 +2315,8 @@ describe('html', function () {
           assets: [
             'b.js',
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -2586,8 +2586,8 @@ describe('html', function () {
         type: 'js',
         assets: [
           'a.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'esmodule-helpers.js',
           'get-worker-url.js',
           'index.js',
diff --git a/packages/core/integration-tests/test/javascript.js b/packages/core/integration-tests/test/javascript.js
index c670dc8d3..b028be9c5 100644
--- a/packages/core/integration-tests/test/javascript.js
+++ b/packages/core/integration-tests/test/javascript.js
@@ -424,8 +424,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -669,8 +669,8 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bar.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'foo.js',
@@ -710,8 +710,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -739,8 +739,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -772,8 +772,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -808,8 +808,8 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'c.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'bundle-manifest.js',
@@ -836,8 +836,8 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'common.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -866,8 +866,8 @@ describe('javascript', function () {
         name: 'b.js',
         assets: [
           'b.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -876,8 +876,8 @@ describe('javascript', function () {
         name: 'a.js',
         assets: [
           'a.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
@@ -900,8 +900,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -935,8 +935,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -965,7 +965,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         type: 'txt',
@@ -997,8 +997,8 @@ describe('javascript', function () {
           name: 'index.js',
           assets: [
             'index.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'esmodule-helpers.js',
           ],
         },
@@ -1035,8 +1035,8 @@ describe('javascript', function () {
           name: 'cjs.js',
           assets: [
             'cjs.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'esmodule-helpers.js',
           ],
         },
@@ -1148,7 +1148,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         type: 'txt',
@@ -2713,8 +2713,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -2799,8 +2799,8 @@ describe('javascript', function () {
         name: 'ts.js',
         assets: [
           'ts.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2823,8 +2823,8 @@ describe('javascript', function () {
         name: 'ts-interop.js',
         assets: [
           'ts-interop.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2853,8 +2853,8 @@ describe('javascript', function () {
         name: 'ts-interop-arrow.js',
         assets: [
           'ts-interop-arrow.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2881,8 +2881,8 @@ describe('javascript', function () {
         name: 'rollup.js',
         assets: [
           'rollup.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2920,8 +2920,8 @@ describe('javascript', function () {
         name: 'resolve-chain.js',
         assets: [
           'resolve-chain.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2944,8 +2944,8 @@ describe('javascript', function () {
         name: 'atlaspack.js',
         assets: [
           'atlaspack.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -3102,8 +3102,8 @@ describe('javascript', function () {
         name: 'entry2.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'child.js',
           'entry2.js',
@@ -3124,8 +3124,8 @@ describe('javascript', function () {
         name: 'same-ancestry.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'dep.js',
           'js-loader.js',
@@ -3172,8 +3172,8 @@ describe('javascript', function () {
         name: 'get-dep.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'get-dep.js',
           'js-loader.js',
@@ -3235,8 +3235,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -3260,8 +3260,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3294,8 +3294,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3365,8 +3365,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3376,8 +3376,8 @@ describe('javascript', function () {
         name: 'other-entry.js',
         assets: [
           'other-entry.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -3822,8 +3822,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -3853,8 +3853,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'bundle-manifest.js',
@@ -3940,8 +3940,8 @@ describe('javascript', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -4283,8 +4283,8 @@ describe('javascript', function () {
             'static-dynamic-url.js',
             'other.js',
             'esmodule-helpers.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4355,8 +4355,8 @@ describe('javascript', function () {
           assets: [
             'dynamic-url.js',
             'esmodule-helpers.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4468,8 +4468,8 @@ describe('javascript', function () {
         name: 'entry-a.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'entry-a.js',
           'js-loader.js',
@@ -4479,8 +4479,8 @@ describe('javascript', function () {
         name: 'entry-b.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'entry-b.js',
           'js-loader.js',
diff --git a/packages/core/integration-tests/test/lazy-compile.js b/packages/core/integration-tests/test/lazy-compile.js
index 5ff89fbeb..5e1f08e20 100644
--- a/packages/core/integration-tests/test/lazy-compile.js
+++ b/packages/core/integration-tests/test/lazy-compile.js
@@ -92,8 +92,8 @@ describe.v2('lazy compile', function () {
       {
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -176,8 +176,8 @@ describe.v2('lazy compile', function () {
         name: /^index.*/,
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -247,8 +247,8 @@ describe.v2('lazy compile', function () {
         name: /^index.*/,
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
diff --git a/packages/core/integration-tests/test/rust.js b/packages/core/integration-tests/test/rust.js
index 79fc99177..ea88ef68f 100644
--- a/packages/core/integration-tests/test/rust.js
+++ b/packages/core/integration-tests/test/rust.js
@@ -27,8 +27,8 @@ describe.skip('rust', function () {
       name: 'index.js',
       assets: [
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -65,8 +65,8 @@ describe.skip('rust', function () {
       name: 'index.js',
       assets: [
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -102,8 +102,8 @@ describe.skip('rust', function () {
       name: 'index.js',
       assets: [
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -133,8 +133,8 @@ describe.skip('rust', function () {
       name: 'index.js',
       assets: [
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -167,8 +167,8 @@ describe.skip('rust', function () {
       name: 'index.js',
       assets: [
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
diff --git a/packages/core/integration-tests/test/scope-hoisting.js b/packages/core/integration-tests/test/scope-hoisting.js
index 6780978df..a4f5c3395 100644
--- a/packages/core/integration-tests/test/scope-hoisting.js
+++ b/packages/core/integration-tests/test/scope-hoisting.js
@@ -2378,8 +2378,8 @@ describe('scope hoisting', function () {
             'foo.js',
             'bar.js',
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4360,7 +4360,7 @@ describe('scope hoisting', function () {
       assertBundles(b, [
         {
           type: 'js',
-          assets: ['a.js', 'b.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+          assets: ['a.js', 'b.js', 'bundle-url.js', 'bundle-url-common.js'],
         },
         {
           type: 'txt',
@@ -5637,8 +5637,8 @@ describe('scope hoisting', function () {
         name: 'same-ancestry-scope-hoisting.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'dep.js',
           'js-loader.js',
@@ -5665,8 +5665,8 @@ describe('scope hoisting', function () {
         assets: [
           'index.js',
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5706,8 +5706,8 @@ describe('scope hoisting', function () {
         name: 'get-dep-scope-hoisting.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'get-dep-scope-hoisting.js',
           'js-loader.js',
@@ -5757,8 +5757,8 @@ describe('scope hoisting', function () {
         name: 'scope-hoisting.js',
         assets: [
           'bundle-manifest.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'scope-hoisting.js',
           'js-loader.js',
@@ -5810,8 +5810,8 @@ describe('scope hoisting', function () {
         name: 'scope-hoisting.js',
         assets: [
           'scope-hoisting.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5839,8 +5839,8 @@ describe('scope hoisting', function () {
         name: 'scope-hoisting.js',
         assets: [
           'scope-hoisting.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5849,8 +5849,8 @@ describe('scope hoisting', function () {
         name: 'other-entry.js',
         assets: [
           'other-entry.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
diff --git a/packages/core/integration-tests/test/server.js b/packages/core/integration-tests/test/server.js
index 0de51d5e0..c2a5b1305 100644
--- a/packages/core/integration-tests/test/server.js
+++ b/packages/core/integration-tests/test/server.js
@@ -586,8 +586,8 @@ describe.v2('server', function () {
       {
         name: 'index.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'index.js',
@@ -627,8 +627,8 @@ describe.v2('server', function () {
       {
         name: 'index.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'index.js',
diff --git a/packages/core/integration-tests/test/svg.js b/packages/core/integration-tests/test/svg.js
index a1c2604c5..617af4311 100644
--- a/packages/core/integration-tests/test/svg.js
+++ b/packages/core/integration-tests/test/svg.js
@@ -257,7 +257,7 @@ describe('svg', function () {
 
     assertBundles(b, [
       {
-        assets: ['index.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         assets: ['circle.svg'],
diff --git a/packages/core/integration-tests/test/typescript.js b/packages/core/integration-tests/test/typescript.js
index 1769bd857..fe4f7eaa0 100644
--- a/packages/core/integration-tests/test/typescript.js
+++ b/packages/core/integration-tests/test/typescript.js
@@ -113,8 +113,8 @@ describe('typescript', function () {
             name: 'index.js',
             assets: [
               'index.ts',
-              'bundle-url.ts',
-              'bundle-url-common.ts',
+              'bundle-url.js',
+              'bundle-url-common.js',
               'esmodule-helpers.js',
             ],
           },
diff --git a/packages/core/integration-tests/test/wasm.js b/packages/core/integration-tests/test/wasm.js
index 8963e0cad..ea8ac5c35 100644
--- a/packages/core/integration-tests/test/wasm.js
+++ b/packages/core/integration-tests/test/wasm.js
@@ -32,8 +32,8 @@ describe.skip('wasm', function () {
           assets: [
             'index.js',
             'bundle-loader.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'wasm-loader.js',
           ],
           childBundles: [
@@ -67,8 +67,8 @@ describe.skip('wasm', function () {
           assets: [
             'index.js',
             'bundle-loader.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'wasm-loader.js',
           ],
           childBundles: [
@@ -101,8 +101,8 @@ describe.skip('wasm', function () {
           assets: [
             'index.js',
             'bundle-loader.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'js-loader.js',
             'wasm-loader.js',
           ],
diff --git a/packages/core/integration-tests/test/watcher.js b/packages/core/integration-tests/test/watcher.js
index 6ec393aa3..41fa8bd55 100644
--- a/packages/core/integration-tests/test/watcher.js
+++ b/packages/core/integration-tests/test/watcher.js
@@ -160,8 +160,8 @@ describe.v2('watcher', function () {
         'common.js',
         'common-dep.js',
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -201,8 +201,8 @@ describe.v2('watcher', function () {
       assets: [
         'index.js',
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -277,8 +277,8 @@ describe.v2('watcher', function () {
         'common.js',
         'common-dep.js',
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -321,8 +321,8 @@ describe.v2('watcher', function () {
         'index.js',
         'common.js',
         'bundle-loader.js',
-        'bundle-url.ts',
-        'bundle-url-common.ts',
+        'bundle-url.js',
+        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -447,8 +447,8 @@ describe.v2('watcher', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -471,8 +471,8 @@ describe.v2('watcher', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
diff --git a/packages/core/integration-tests/test/webextension.js b/packages/core/integration-tests/test/webextension.js
index b9d15fe36..55393236d 100644
--- a/packages/core/integration-tests/test/webextension.js
+++ b/packages/core/integration-tests/test/webextension.js
@@ -126,8 +126,8 @@ describe.v2('webextension', function () {
         assets: [
           'popup.js',
           'esmodule-helpers.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
         ],
       },
       {assets: ['side-panel.html']},
diff --git a/packages/core/integration-tests/test/workers.js b/packages/core/integration-tests/test/workers.js
index 705ea32bb..5df48b1e5 100644
--- a/packages/core/integration-tests/test/workers.js
+++ b/packages/core/integration-tests/test/workers.js
@@ -33,8 +33,8 @@ describe('atlaspack', function () {
           'worker-client.js',
           'feature.js',
           'get-worker-url.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
         ],
       },
       {
@@ -59,16 +59,16 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
       {
         assets: [
           'worker.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -109,16 +109,16 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
       {
         assets: [
           'worker.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -148,16 +148,16 @@ describe('atlaspack', function () {
         name: 'index-nested.js',
         assets: [
           'index-nested.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
       {
         assets: [
           'worker-nested.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'cacheLoader.js',
           'js-loader.js',
@@ -166,8 +166,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'worker.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -199,8 +199,8 @@ describe('atlaspack', function () {
         name: 'index-async.js',
         assets: [
           'index-async.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'cacheLoader.js',
           'js-loader.js',
@@ -209,8 +209,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'worker.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -243,8 +243,8 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'workerHelpers.js',
           'esmodule-helpers.js',
@@ -253,8 +253,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'workerHelpers.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -273,8 +273,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'import-meta.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -282,8 +282,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'import-meta.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -316,8 +316,8 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
         ],
@@ -382,8 +382,8 @@ describe('atlaspack', function () {
           name: 'index.js',
           assets: [
             'index.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'get-worker-url.js',
             'bundle-manifest.js',
           ],
@@ -600,8 +600,8 @@ describe('atlaspack', function () {
           'common.js',
           'worker-client.js',
           'feature.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -729,8 +729,8 @@ describe('atlaspack', function () {
         type: 'js',
         assets: [
           'index-variable.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -757,8 +757,8 @@ describe('atlaspack', function () {
         type: 'js',
         assets: [
           'index-external.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -783,8 +783,8 @@ describe('atlaspack', function () {
         assets: [
           'index.js',
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
         ],
       },
       {
@@ -809,7 +809,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'module.js',
-        assets: ['module.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['module.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         assets: ['module-worker.js'],
@@ -842,7 +842,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'scope.js',
-        assets: ['bundle-url.ts', 'bundle-url-common.ts', 'scope.js'],
+        assets: ['bundle-url.js', 'bundle-url-common.js', 'scope.js'],
       },
       {
         assets: ['module-worker.js'],
@@ -951,7 +951,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'manifest.js',
-        assets: ['manifest.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['manifest.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         assets: ['manifest-worker.js', 'service-worker.js'],
@@ -984,7 +984,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.ts', 'bundle-url-common.ts'],
+        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
       },
       {
         assets: ['worker.js'],
@@ -1113,8 +1113,8 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -1134,8 +1134,8 @@ describe('atlaspack', function () {
         name: 'index.js',
         assets: [
           'index.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -1281,8 +1281,8 @@ describe('atlaspack', function () {
         assets: [
           'index.js',
           'lodash.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
           'esmodule-helpers.js',
@@ -1291,8 +1291,8 @@ describe('atlaspack', function () {
       {
         assets: [
           'worker-a.js',
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
         ],
@@ -1343,15 +1343,15 @@ describe('atlaspack', function () {
             'get-worker-url.js',
             'lodash.js',
             'esmodule-helpers.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
           ],
         },
         {
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
           ],
         },
         {
@@ -1415,8 +1415,8 @@ describe('atlaspack', function () {
         {
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'get-worker-url.js',
             'index.js',
@@ -1427,8 +1427,8 @@ describe('atlaspack', function () {
         {
           assets: [
             'bundle-manifest.js',
-            'bundle-url.ts',
-            'bundle-url-common.ts',
+            'bundle-url.js',
+            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
             'large.js',
@@ -1471,16 +1471,16 @@ describe('atlaspack', function () {
       {
         name: 'index.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'index.js',
         ],
       },
       {
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'get-worker-url.js',
           'worker1.js',
           'worker2.js',
diff --git a/packages/core/integration-tests/test/worklets.js b/packages/core/integration-tests/test/worklets.js
index 54834b635..90e03d08c 100644
--- a/packages/core/integration-tests/test/worklets.js
+++ b/packages/core/integration-tests/test/worklets.js
@@ -52,7 +52,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'url-worklet.js',
-        assets: ['bundle-url.ts', 'bundle-url-common.ts', 'url-worklet.js'],
+        assets: ['bundle-url.js', 'bundle-url-common.js', 'url-worklet.js'],
       },
       {
         type: 'js',
@@ -99,8 +99,8 @@ describe('atlaspack', function () {
       {
         name: 'pipeline.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'pipeline.js',
           'bundle-manifest.js',
         ],
@@ -145,8 +145,8 @@ describe('atlaspack', function () {
       {
         name: 'url.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'esmodule-helpers.js',
           'url.js',
         ],
@@ -248,8 +248,8 @@ describe('atlaspack', function () {
       {
         name: 'worklet-pipeline.js',
         assets: [
-          'bundle-url.ts',
-          'bundle-url-common.ts',
+          'bundle-url.js',
+          'bundle-url-common.js',
           'bundle-manifest.js',
           'worklet-pipeline.js',
         ],
diff --git a/packages/runtimes/js/src/helpers/bundle-url-common.ts b/packages/runtimes/js/src/helpers/bundle-url-common.js
similarity index 58%
rename from packages/runtimes/js/src/helpers/bundle-url-common.ts
rename to packages/runtimes/js/src/helpers/bundle-url-common.js
index 982ab1feb..8a44855a8 100644
--- a/packages/runtimes/js/src/helpers/bundle-url-common.ts
+++ b/packages/runtimes/js/src/helpers/bundle-url-common.js
@@ -1,5 +1,9 @@
-// Get the URL without the filename (last / segment)
-function getBaseURL(url: string) {
+/** Get the URL without the filename (last / segment)
+ *
+ * @param {string} url
+ * @returns {string} The URL with the file name removed
+ */
+function getBaseURL(url) {
   return url.slice(0, url.lastIndexOf('/')) + '/';
 }
 
diff --git a/packages/runtimes/js/src/helpers/bundle-url-shards.ts b/packages/runtimes/js/src/helpers/bundle-url-shards.js
similarity index 74%
rename from packages/runtimes/js/src/helpers/bundle-url-shards.ts
rename to packages/runtimes/js/src/helpers/bundle-url-shards.js
index 23d928a95..c9667bc11 100644
--- a/packages/runtimes/js/src/helpers/bundle-url-shards.ts
+++ b/packages/runtimes/js/src/helpers/bundle-url-shards.js
@@ -1,12 +1,17 @@
 const {getBaseURL, stackTraceUrlRegexp} = require('./bundle-url-common');
 
-const bundleURL: Record<string, string> = {};
-
-function getShardedBundleURL(
-  bundleName: string,
-  maxShards: number,
-  inputError?: string,
-): string {
+const bundleURL = {};
+
+/**
+ * Retrieves the sharded bundle URL based on the bundle name and the maximum number of shards.
+ *
+ * @param {string} bundleName - The file name of the requested bundle.
+ * @param {number} maxShards - The maximum number of domain shards available.
+ * @param {Error} inputError - An error object to extract the stack trace from
+ * (for testing purposes).
+ * @returns {string} The URL of the sharded bundle, without file name.
+ */
+function getShardedBundleURL(bundleName, maxShards, inputError) {
   let value = bundleURL[bundleName];
 
   if (value) {
@@ -28,7 +33,7 @@ function getShardedBundleURL(
     const baseUrl = getBaseURL(stackUrl);
 
     // Global variable is set by SSR servers when HTTP1.1 traffic is detected
-    if (!Boolean(globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS)) {
+    if (!globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS) {
       bundleURL[bundleName] = baseUrl;
       return baseUrl;
     }
@@ -46,7 +51,7 @@ function getShardedBundleURL(
   }
 }
 
-function getDomainShardIndex(str: string, maxShards: number) {
+function getDomainShardIndex(str, maxShards) {
   let shard = str.split('').reduce((a, b) => {
     const n = (a << maxShards) - a + b.charCodeAt(0);
 
@@ -65,7 +70,7 @@ function getDomainShardIndex(str: string, maxShards: number) {
   return shard;
 }
 
-function getShardedDomain(domain: string, shard: number) {
+function getShardedDomain(domain, shard) {
   let i = domain.indexOf('.');
 
   // Domains like localhost have no . separators
@@ -82,7 +87,7 @@ function getShardedDomain(domain: string, shard: number) {
 
 const trailingShardRegex = /-\d+$/;
 
-function removeTrailingShard(subdomain: string) {
+function removeTrailingShard(subdomain) {
   if (!trailingShardRegex.test(subdomain)) {
     return subdomain;
   }
diff --git a/packages/runtimes/js/src/helpers/bundle-url.ts b/packages/runtimes/js/src/helpers/bundle-url.js
similarity index 65%
rename from packages/runtimes/js/src/helpers/bundle-url.ts
rename to packages/runtimes/js/src/helpers/bundle-url.js
index 48f6fc1a3..bbd4161b3 100644
--- a/packages/runtimes/js/src/helpers/bundle-url.ts
+++ b/packages/runtimes/js/src/helpers/bundle-url.js
@@ -2,7 +2,14 @@ const {getBaseURL, stackTraceUrlRegexp} = require('./bundle-url-common');
 
 const bundleURL = {};
 
-function getBundleURLCached(id: string) {
+/**
+ * Retrieves the cached bundle URL for a given identifier.
+ * If the URL is not cached, it computes and stores it in the cache.
+ *
+ * @param {string} id - The identifier for the bundle.
+ * @returns {string} The URL of the bundle, without file name.
+ */
+function getBundleURLCached(id) {
   let value = bundleURL[id];
 
   if (!value) {
@@ -28,7 +35,11 @@ function getBundleURL() {
   return '/';
 }
 
-function getOrigin(url: string) {
+/**
+ * @param {string} url
+ * @returns {string}
+ */
+function getOrigin(url) {
   return new URL(url).origin;
 }