diff --git a/packages/core/integration-tests/test/BundleGraph.js b/packages/core/integration-tests/test/BundleGraph.js
index 7c1a1d19e..52f242915 100644
--- a/packages/core/integration-tests/test/BundleGraph.js
+++ b/packages/core/integration-tests/test/BundleGraph.js
@@ -66,10 +66,6 @@ describe('BundleGraph', () => {
         type: 'asset',
         value: 'bundle-url.js',
       },
-      {
-        type: 'asset',
-        value: 'bundle-url-common.js',
-      },
       {
         type: 'asset',
         value: 'runtime.js',
@@ -82,10 +78,6 @@ describe('BundleGraph', () => {
         type: 'asset',
         value: 'bundle-url.js',
       },
-      {
-        type: 'asset',
-        value: 'bundle-url-common.js',
-      },
       {
         type: 'asset',
         value: 'esmodule-helpers.js',
diff --git a/packages/core/integration-tests/test/bundle-text.js b/packages/core/integration-tests/test/bundle-text.js
index c0e504d78..3ecdc52c7 100644
--- a/packages/core/integration-tests/test/bundle-text.js
+++ b/packages/core/integration-tests/test/bundle-text.js
@@ -245,7 +245,6 @@ describe('bundle-text:', function () {
                   'index.js',
                   'esmodule-helpers.js',
                   '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 905d0c500..e6b8687eb 100644
--- a/packages/core/integration-tests/test/bundler.js
+++ b/packages/core/integration-tests/test/bundler.js
@@ -71,7 +71,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -161,7 +160,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -256,7 +254,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -348,7 +345,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -467,7 +463,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -546,7 +541,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -625,7 +619,6 @@ describe('bundler', function () {
             'inline-module.js',
             'local.html',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -656,7 +649,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -709,7 +701,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -761,7 +752,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -816,7 +806,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -870,7 +859,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -945,7 +933,7 @@ describe('bundler', function () {
         ],
       },
       {
-        assets: ['bundle-manifest.js', 'bundle-url.js', 'bundle-url-common.js'], // manifest bundle
+        assets: ['bundle-manifest.js', 'bundle-url.js'], // manifest bundle
       },
       {
         assets: [
@@ -957,7 +945,7 @@ describe('bundler', function () {
         ],
       },
       {
-        assets: ['bundle-manifest.js', 'bundle-url.js', 'bundle-url-common.js'], // manifest bundle
+        assets: ['bundle-manifest.js', 'bundle-url.js'], // manifest bundle
       },
       {
         assets: ['c.js'],
@@ -1014,7 +1002,6 @@ describe('bundler', function () {
           'a.js',
           'b.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -1086,7 +1073,6 @@ describe('bundler', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -1429,7 +1415,6 @@ describe('bundler', function () {
           assets: [
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'css-loader.js',
             'esmodule-helpers.js',
@@ -1597,7 +1582,6 @@ describe('bundler', function () {
           assets: [
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'css-loader.js',
             'esmodule-helpers.js',
@@ -1899,7 +1883,6 @@ describe('bundler', function () {
             assets: [
               'bundle-manifest.js',
               'bundle-url.js',
-              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -1977,7 +1960,6 @@ describe('bundler', function () {
             assets: [
               'bundle-manifest.js',
               'bundle-url.js',
-              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -2059,7 +2041,6 @@ describe('bundler', function () {
             assets: [
               'bundle-manifest.js',
               'bundle-url.js',
-              'bundle-url-common.js',
               'cacheLoader.js',
               'index.js',
               'js-loader.js',
@@ -2348,7 +2329,6 @@ describe('bundler', function () {
             'a.js',
             'b.js',
             '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 5de047e92..ea95c07ad 100644
--- a/packages/core/integration-tests/test/cache.js
+++ b/packages/core/integration-tests/test/cache.js
@@ -4999,7 +4999,6 @@ describe.v2('cache', function () {
                     'index.js',
                     'c.js',
                     'bundle-url.js',
-                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5038,7 +5037,6 @@ describe.v2('cache', function () {
               'index.js',
               'c.js',
               'bundle-url.js',
-              'bundle-url-common.js',
               'cacheLoader.js',
               'js-loader.js',
               'bundle-manifest.js',
@@ -5115,7 +5113,6 @@ describe.v2('cache', function () {
                     'index.js',
                     'c.js',
                     'bundle-url.js',
-                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5154,7 +5151,6 @@ describe.v2('cache', function () {
               'index.js',
               'c.js',
               'bundle-url.js',
-              'bundle-url-common.js',
               'cacheLoader.js',
               'js-loader.js',
               'bundle-manifest.js',
@@ -5195,7 +5191,6 @@ describe.v2('cache', function () {
                     'index.js',
                     'c.js',
                     'bundle-url.js',
-                    'bundle-url-common.js',
                     'cacheLoader.js',
                     'js-loader.js',
                     'bundle-manifest.js',
@@ -5228,7 +5223,6 @@ describe.v2('cache', function () {
               'index.js',
               'c.js',
               '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 7b7df559b..d9df8904a 100644
--- a/packages/core/integration-tests/test/css.js
+++ b/packages/core/integration-tests/test/css.js
@@ -79,13 +79,7 @@ describe('css', () => {
       {
         name: 'entry.js',
         type: 'js',
-        assets: [
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'entry.js',
-          'js-loader.js',
-        ],
+        assets: ['bundle-url.js', 'cacheLoader.js', 'entry.js', 'js-loader.js'],
       },
       {
         type: 'js',
@@ -108,7 +102,6 @@ describe('css', () => {
         type: 'js',
         assets: [
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'entry.js',
@@ -133,7 +126,6 @@ describe('css', () => {
         name: 'index.js',
         assets: [
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'index.js',
diff --git a/packages/core/integration-tests/test/domain-sharding.js b/packages/core/integration-tests/test/domain-sharding.js
new file mode 100644
index 000000000..f803ea787
--- /dev/null
+++ b/packages/core/integration-tests/test/domain-sharding.js
@@ -0,0 +1,124 @@
+// @flow
+import assert from 'assert';
+import path from 'path';
+
+import {fsFixture, overlayFS, bundle} from '@atlaspack/test-utils';
+
+const maxShards = 8;
+
+describe('domain-sharding', () => {
+  describe('should insert all arguments into compiled JS Runtime output', () => {
+    it('for bundle manifest urls', async () => {
+      await fsFixture(overlayFS)`
+          package.json:
+            {
+              "name": "bundle-sharding-test",
+              "targets": {
+                "default": {
+                  "context": "browser",
+                  "optimize": false
+                }
+              },
+              "@atlaspack/runtime-js": {
+                "domainSharding": {
+                  "maxShards": ${maxShards}
+                }
+              }
+            }
+
+          src/index.js:
+            async function fn() {
+              const a = await import('./a.js');
+              const b = await import('./b.js');
+              console.log('a', a, b);
+            }
+            fn();
+
+          src/a.js:
+            export const a = async () => {
+              const b = await import('./b');
+              return b + 'A';
+            }
+          src/b.js:
+            export const b = 'B';
+
+          yarn.lock:
+        `;
+
+      const bundleGraph = await bundle('src/index.js', {
+        inputFS: overlayFS,
+        mode: 'production',
+      });
+
+      const mainBundle = bundleGraph
+        .getBundles()
+        .find((b) => b.name === 'index.js');
+      if (!mainBundle) return assert(mainBundle);
+
+      const code = await overlayFS.readFile(mainBundle.filePath, 'utf-8');
+
+      assert.ok(
+        code.includes(
+          `require("85e3bc75ab94a411")(require("f41955f5cc01151").shardUrl(require("40cc202a4c7abf8d").resolve("aVRxe"), ${maxShards}))`,
+          'Expected generated code for shardUrl was not found',
+        ),
+      );
+    });
+
+    it('for all other urls', async () => {
+      const maxShards = 8;
+      await fsFixture(overlayFS)`
+        package.json:
+          {
+            "name": "bundle-sharding-test",
+            "@atlaspack/runtime-js": {
+              "domainSharding": {
+                "maxShards": ${maxShards}
+              }
+            }
+          }
+
+        src/index.js:
+          async function fn() {
+            const a = await import('./a.js');
+            const b = await import('./b.js');
+            console.log('a', a, b);
+          }
+          fn();
+
+        src/a.js:
+          export const a = async () => {
+            const b = await import('./b');
+            return b + 'A';
+          }
+        src/b.js:
+          export const b = 'B';
+
+        yarn.lock:
+      `;
+
+      const bundleGraph = await bundle('src/index.js', {inputFS: overlayFS});
+
+      const mainBundle = bundleGraph
+        .getBundles()
+        .find((b) => b.name === 'index.js');
+      const commonBundle = bundleGraph
+        .getBundles()
+        .find((b) => b.displayName === 'b.[hash].js');
+
+      assert(commonBundle, 'Unable to locate the shared bundle');
+
+      const commonFileName = path.basename(commonBundle?.filePath ?? '');
+
+      if (!mainBundle) return assert(mainBundle);
+
+      const code = await overlayFS.readFile(mainBundle.filePath, 'utf-8');
+      assert.ok(
+        code.includes(
+          `require("e480067c5bab431e")(require("5091f5df3a0c51b6").shardUrl(require("5e2c91749d676db2").getBundleURL('d8wEr') + "${commonFileName}", ${maxShards})`,
+        ),
+        'Expected generated code for shardUrl was not found',
+      );
+    });
+  });
+});
diff --git a/packages/core/integration-tests/test/glob.js b/packages/core/integration-tests/test/glob.js
index 81f15f3b1..cd7832fd3 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.js', 'bundle-url-common.js'],
+        assets: ['index.js', '*.js', 'bundle-url.js'],
       },
       {
         type: 'txt',
@@ -117,7 +117,6 @@ describe('glob', function () {
           'index.js',
           '*.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -241,7 +240,6 @@ describe('glob', function () {
             '*.js',
             '*.js',
             '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 b9aa70f56..cf1373b1d 100644
--- a/packages/core/integration-tests/test/html.js
+++ b/packages/core/integration-tests/test/html.js
@@ -485,7 +485,6 @@ describe('html', function () {
         assets: [
           'index.css',
           'bundle-url.js',
-          'bundle-url-common.js',
           'css-loader.js',
           'hmr-runtime.js',
         ],
@@ -1876,7 +1875,6 @@ describe('html', function () {
           assets: [
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'index.js',
             'index.js',
@@ -2210,7 +2208,6 @@ describe('html', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -2234,7 +2231,6 @@ describe('html', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -2306,7 +2302,6 @@ describe('html', function () {
             'a.js',
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -2316,7 +2311,6 @@ describe('html', function () {
             'b.js',
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -2587,7 +2581,6 @@ describe('html', function () {
         assets: [
           'a.js',
           '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 b028be9c5..d86f77f79 100644
--- a/packages/core/integration-tests/test/javascript.js
+++ b/packages/core/integration-tests/test/javascript.js
@@ -422,13 +422,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['local.js'],
@@ -670,7 +664,6 @@ describe('javascript', function () {
           'index.js',
           'bar.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'foo.js',
@@ -708,13 +701,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['local.js', 'esmodule-helpers.js'],
@@ -740,7 +727,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -770,13 +756,7 @@ describe('javascript', function () {
       },
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
     ]);
 
@@ -809,7 +789,6 @@ describe('javascript', function () {
           'index.js',
           'c.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'bundle-manifest.js',
@@ -837,7 +816,6 @@ describe('javascript', function () {
           'index.js',
           'common.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -864,20 +842,13 @@ describe('javascript', function () {
       },
       {
         name: 'b.js',
-        assets: [
-          'b.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['b.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         name: 'a.js',
         assets: [
           'a.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
@@ -901,7 +872,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -936,7 +906,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -965,7 +934,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
+        assets: ['index.js', 'bundle-url.js'],
       },
       {
         type: 'txt',
@@ -995,12 +964,7 @@ describe('javascript', function () {
       assertBundles(b, [
         {
           name: 'index.js',
-          assets: [
-            'index.js',
-            'bundle-url.js',
-            'bundle-url-common.js',
-            'esmodule-helpers.js',
-          ],
+          assets: ['index.js', 'bundle-url.js', 'esmodule-helpers.js'],
         },
         {
           type: 'txt',
@@ -1033,12 +997,7 @@ describe('javascript', function () {
       assertBundles(b, [
         {
           name: 'cjs.js',
-          assets: [
-            'cjs.js',
-            'bundle-url.js',
-            'bundle-url-common.js',
-            'esmodule-helpers.js',
-          ],
+          assets: ['cjs.js', 'bundle-url.js', 'esmodule-helpers.js'],
         },
         {
           type: 'txt',
@@ -1148,7 +1107,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
+        assets: ['index.js', 'bundle-url.js'],
       },
       {
         type: 'txt',
@@ -2714,7 +2673,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'esmodule-helpers.js',
           'js-loader.js',
@@ -2797,13 +2755,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'ts.js',
-        assets: [
-          'ts.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['ts.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['async.js'],
@@ -2824,7 +2776,6 @@ describe('javascript', function () {
         assets: [
           'ts-interop.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2854,7 +2805,6 @@ describe('javascript', function () {
         assets: [
           'ts-interop-arrow.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2882,7 +2832,6 @@ describe('javascript', function () {
         assets: [
           'rollup.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2921,7 +2870,6 @@ describe('javascript', function () {
         assets: [
           'resolve-chain.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -2945,7 +2893,6 @@ describe('javascript', function () {
         assets: [
           'atlaspack.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -3103,7 +3050,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'child.js',
           'entry2.js',
@@ -3125,7 +3071,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'dep.js',
           'js-loader.js',
@@ -3173,7 +3118,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'get-dep.js',
           'js-loader.js',
@@ -3236,7 +3180,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'index.js',
           'js-loader.js',
@@ -3261,7 +3204,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3295,7 +3237,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3366,7 +3307,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'esmodule-helpers.js',
@@ -3377,7 +3317,6 @@ describe('javascript', function () {
         assets: [
           'other-entry.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -3820,13 +3759,7 @@ describe('javascript', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['async1.js', 'shared.js', 'esmodule-helpers.js'],
@@ -3854,7 +3787,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
           'bundle-manifest.js',
@@ -3941,7 +3873,6 @@ describe('javascript', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'esmodule-helpers.js',
@@ -4284,7 +4215,6 @@ describe('javascript', function () {
             'other.js',
             'esmodule-helpers.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4356,7 +4286,6 @@ describe('javascript', function () {
             'dynamic-url.js',
             'esmodule-helpers.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4469,7 +4398,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'entry-a.js',
           'js-loader.js',
@@ -4480,7 +4408,6 @@ describe('javascript', function () {
         assets: [
           'bundle-manifest.js',
           '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 5e1f08e20..8ce06959d 100644
--- a/packages/core/integration-tests/test/lazy-compile.js
+++ b/packages/core/integration-tests/test/lazy-compile.js
@@ -90,13 +90,7 @@ describe.v2('lazy compile', function () {
     // `parallel-lazy-1` which wasn't requested.
     assertBundles(result.bundleGraph, [
       {
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['lazy-1.js', 'esmodule-helpers.js'],
@@ -174,13 +168,7 @@ describe.v2('lazy compile', function () {
     assertBundles(result.bundleGraph, [
       {
         name: /^index.*/,
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         // This will be a placeholder, but that info isn't available in the BundleGraph
@@ -245,13 +233,7 @@ describe.v2('lazy compile', function () {
     assertBundles(result.bundleGraph, [
       {
         name: /^index.*/,
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {
         assets: ['lazy-1.js', 'esmodule-helpers.js'],
diff --git a/packages/core/integration-tests/test/rust.js b/packages/core/integration-tests/test/rust.js
index ea88ef68f..3b499e44a 100644
--- a/packages/core/integration-tests/test/rust.js
+++ b/packages/core/integration-tests/test/rust.js
@@ -28,7 +28,6 @@ describe.skip('rust', function () {
       assets: [
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -66,7 +65,6 @@ describe.skip('rust', function () {
       assets: [
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -103,7 +101,6 @@ describe.skip('rust', function () {
       assets: [
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -134,7 +131,6 @@ describe.skip('rust', function () {
       assets: [
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'index.js',
         'wasm-loader.js',
       ],
@@ -168,7 +164,6 @@ describe.skip('rust', function () {
       assets: [
         'bundle-loader.js',
         '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 a4f5c3395..d34d63b50 100644
--- a/packages/core/integration-tests/test/scope-hoisting.js
+++ b/packages/core/integration-tests/test/scope-hoisting.js
@@ -2379,7 +2379,6 @@ describe('scope hoisting', function () {
             'bar.js',
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
           ],
@@ -4360,7 +4359,7 @@ describe('scope hoisting', function () {
       assertBundles(b, [
         {
           type: 'js',
-          assets: ['a.js', 'b.js', 'bundle-url.js', 'bundle-url-common.js'],
+          assets: ['a.js', 'b.js', 'bundle-url.js'],
         },
         {
           type: 'txt',
@@ -5638,7 +5637,6 @@ describe('scope hoisting', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'dep.js',
           'js-loader.js',
@@ -5666,7 +5664,6 @@ describe('scope hoisting', function () {
           'index.js',
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5707,7 +5704,6 @@ describe('scope hoisting', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'get-dep-scope-hoisting.js',
           'js-loader.js',
@@ -5758,7 +5754,6 @@ describe('scope hoisting', function () {
         assets: [
           'bundle-manifest.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'scope-hoisting.js',
           'js-loader.js',
@@ -5811,7 +5806,6 @@ describe('scope hoisting', function () {
         assets: [
           'scope-hoisting.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5840,7 +5834,6 @@ describe('scope hoisting', function () {
         assets: [
           'scope-hoisting.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -5850,7 +5843,6 @@ describe('scope hoisting', function () {
         assets: [
           'other-entry.js',
           '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 c2a5b1305..32c37d49b 100644
--- a/packages/core/integration-tests/test/server.js
+++ b/packages/core/integration-tests/test/server.js
@@ -587,7 +587,6 @@ describe.v2('server', function () {
         name: 'index.js',
         assets: [
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'css-loader.js',
           'index.js',
@@ -628,7 +627,6 @@ describe.v2('server', function () {
         name: 'index.js',
         assets: [
           '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 617af4311..a06d79967 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.js', 'bundle-url-common.js'],
+        assets: ['index.js', 'bundle-url.js'],
       },
       {
         assets: ['circle.svg'],
diff --git a/packages/core/integration-tests/test/typescript.js b/packages/core/integration-tests/test/typescript.js
index fe4f7eaa0..2af46a883 100644
--- a/packages/core/integration-tests/test/typescript.js
+++ b/packages/core/integration-tests/test/typescript.js
@@ -111,12 +111,7 @@ describe('typescript', function () {
         assertBundles(b, [
           {
             name: 'index.js',
-            assets: [
-              'index.ts',
-              'bundle-url.js',
-              'bundle-url-common.js',
-              'esmodule-helpers.js',
-            ],
+            assets: ['index.ts', 'bundle-url.js', 'esmodule-helpers.js'],
           },
           {
             type: 'txt',
diff --git a/packages/core/integration-tests/test/wasm.js b/packages/core/integration-tests/test/wasm.js
index ea8ac5c35..fbb52adf0 100644
--- a/packages/core/integration-tests/test/wasm.js
+++ b/packages/core/integration-tests/test/wasm.js
@@ -33,7 +33,6 @@ describe.skip('wasm', function () {
             'index.js',
             'bundle-loader.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'wasm-loader.js',
           ],
           childBundles: [
@@ -68,7 +67,6 @@ describe.skip('wasm', function () {
             'index.js',
             'bundle-loader.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'wasm-loader.js',
           ],
           childBundles: [
@@ -102,7 +100,6 @@ describe.skip('wasm', function () {
             'index.js',
             'bundle-loader.js',
             '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 41fa8bd55..309fc90c9 100644
--- a/packages/core/integration-tests/test/watcher.js
+++ b/packages/core/integration-tests/test/watcher.js
@@ -161,7 +161,6 @@ describe.v2('watcher', function () {
         'common-dep.js',
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -198,13 +197,7 @@ describe.v2('watcher', function () {
     bundle = await nextBundle(b);
     await assertBundleTree(bundle, {
       name: 'index.js',
-      assets: [
-        'index.js',
-        'bundle-loader.js',
-        'bundle-url.js',
-        'bundle-url-common.js',
-        'js-loader.js',
-      ],
+      assets: ['index.js', 'bundle-loader.js', 'bundle-url.js', 'js-loader.js'],
       childBundles: [
         {
           assets: ['a.js', 'common.js', 'common-dep.js'],
@@ -278,7 +271,6 @@ describe.v2('watcher', function () {
         'common-dep.js',
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -322,7 +314,6 @@ describe.v2('watcher', function () {
         'common.js',
         'bundle-loader.js',
         'bundle-url.js',
-        'bundle-url-common.js',
         'js-loader.js',
       ],
       childBundles: [
@@ -445,13 +436,7 @@ describe.v2('watcher', function () {
     assertBundles(bundleGraph, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {assets: ['local.js']},
     ]);
@@ -469,13 +454,7 @@ describe.v2('watcher', function () {
     assertBundles(bundleGraph, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'cacheLoader.js',
-          'js-loader.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'cacheLoader.js', 'js-loader.js'],
       },
       {assets: ['local.js']},
       {assets: ['other.js']},
diff --git a/packages/core/integration-tests/test/webextension.js b/packages/core/integration-tests/test/webextension.js
index 55393236d..1fa6a8b92 100644
--- a/packages/core/integration-tests/test/webextension.js
+++ b/packages/core/integration-tests/test/webextension.js
@@ -123,12 +123,7 @@ describe.v2('webextension', function () {
       {assets: ['popup.html']},
       {assets: ['popup.css']},
       {
-        assets: [
-          'popup.js',
-          'esmodule-helpers.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-        ],
+        assets: ['popup.js', 'esmodule-helpers.js', 'bundle-url.js'],
       },
       {assets: ['side-panel.html']},
       {assets: ['content-script.js']},
diff --git a/packages/core/integration-tests/test/workers.js b/packages/core/integration-tests/test/workers.js
index 5df48b1e5..87f9fa8da 100644
--- a/packages/core/integration-tests/test/workers.js
+++ b/packages/core/integration-tests/test/workers.js
@@ -34,7 +34,6 @@ describe('atlaspack', function () {
           'feature.js',
           'get-worker-url.js',
           'bundle-url.js',
-          'bundle-url-common.js',
         ],
       },
       {
@@ -57,18 +56,12 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         assets: [
           'worker.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -107,18 +100,12 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         assets: [
           'worker.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -146,18 +133,12 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index-nested.js',
-        assets: [
-          'index-nested.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index-nested.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         assets: [
           'worker-nested.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'cacheLoader.js',
           'js-loader.js',
@@ -167,7 +148,6 @@ describe('atlaspack', function () {
         assets: [
           'worker.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -200,7 +180,6 @@ describe('atlaspack', function () {
         assets: [
           'index-async.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'cacheLoader.js',
           'js-loader.js',
@@ -210,7 +189,6 @@ describe('atlaspack', function () {
         assets: [
           'worker.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'cacheLoader.js',
           'js-loader.js',
         ],
@@ -244,7 +222,6 @@ describe('atlaspack', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'workerHelpers.js',
           'esmodule-helpers.js',
@@ -254,7 +231,6 @@ describe('atlaspack', function () {
         assets: [
           'workerHelpers.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -274,7 +250,6 @@ describe('atlaspack', function () {
         assets: [
           'import-meta.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -283,7 +258,6 @@ describe('atlaspack', function () {
         assets: [
           'import-meta.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'esmodule-helpers.js',
         ],
@@ -317,7 +291,6 @@ describe('atlaspack', function () {
         assets: [
           'index.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
         ],
@@ -383,7 +356,6 @@ describe('atlaspack', function () {
           assets: [
             'index.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'get-worker-url.js',
             'bundle-manifest.js',
           ],
@@ -601,7 +573,6 @@ describe('atlaspack', function () {
           'worker-client.js',
           'feature.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
         ],
       },
@@ -727,12 +698,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         type: 'js',
-        assets: [
-          'index-variable.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index-variable.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         type: 'js',
@@ -755,12 +721,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         type: 'js',
-        assets: [
-          'index-external.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index-external.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         type: 'js',
@@ -780,12 +741,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-        ],
+        assets: ['index.js', 'index.js', 'bundle-url.js'],
       },
       {
         assets: ['worker-nested.js'],
@@ -809,7 +765,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'module.js',
-        assets: ['module.js', 'bundle-url.js', 'bundle-url-common.js'],
+        assets: ['module.js', 'bundle-url.js'],
       },
       {
         assets: ['module-worker.js'],
@@ -842,7 +798,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'scope.js',
-        assets: ['bundle-url.js', 'bundle-url-common.js', 'scope.js'],
+        assets: ['bundle-url.js', 'scope.js'],
       },
       {
         assets: ['module-worker.js'],
@@ -951,7 +907,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'manifest.js',
-        assets: ['manifest.js', 'bundle-url.js', 'bundle-url-common.js'],
+        assets: ['manifest.js', 'bundle-url.js'],
       },
       {
         assets: ['manifest-worker.js', 'service-worker.js'],
@@ -984,7 +940,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: ['index.js', 'bundle-url.js', 'bundle-url-common.js'],
+        assets: ['index.js', 'bundle-url.js'],
       },
       {
         assets: ['worker.js'],
@@ -1111,12 +1067,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         assets: ['worker.js', 'worker-dep.js'],
@@ -1132,12 +1083,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'index.js',
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-        ],
+        assets: ['index.js', 'bundle-url.js', 'get-worker-url.js'],
       },
       {
         assets: ['worker.js'],
@@ -1282,7 +1228,6 @@ describe('atlaspack', function () {
           'index.js',
           'lodash.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
           'esmodule-helpers.js',
@@ -1292,7 +1237,6 @@ describe('atlaspack', function () {
         assets: [
           'worker-a.js',
           'bundle-url.js',
-          'bundle-url-common.js',
           'get-worker-url.js',
           'bundle-manifest.js',
         ],
@@ -1344,15 +1288,10 @@ describe('atlaspack', function () {
             'lodash.js',
             'esmodule-helpers.js',
             'bundle-url.js',
-            'bundle-url-common.js',
           ],
         },
         {
-          assets: [
-            'bundle-manifest.js',
-            'bundle-url.js',
-            'bundle-url-common.js',
-          ],
+          assets: ['bundle-manifest.js', 'bundle-url.js'],
         },
         {
           assets: ['worker.js', 'lodash.js', 'esmodule-helpers.js'],
@@ -1416,7 +1355,6 @@ describe('atlaspack', function () {
           assets: [
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'get-worker-url.js',
             'index.js',
@@ -1428,7 +1366,6 @@ describe('atlaspack', function () {
           assets: [
             'bundle-manifest.js',
             'bundle-url.js',
-            'bundle-url-common.js',
             'cacheLoader.js',
             'js-loader.js',
             'large.js',
@@ -1470,17 +1407,11 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'index.js',
-        assets: [
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'get-worker-url.js',
-          'index.js',
-        ],
+        assets: ['bundle-url.js', 'get-worker-url.js', 'index.js'],
       },
       {
         assets: [
           '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 90e03d08c..84f528f3c 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.js', 'bundle-url-common.js', 'url-worklet.js'],
+        assets: ['bundle-url.js', 'url-worklet.js'],
       },
       {
         type: 'js',
@@ -98,12 +98,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'pipeline.js',
-        assets: [
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'pipeline.js',
-          'bundle-manifest.js',
-        ],
+        assets: ['bundle-url.js', 'pipeline.js', 'bundle-manifest.js'],
       },
       {
         type: 'js',
@@ -144,12 +139,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'url.js',
-        assets: [
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'esmodule-helpers.js',
-          'url.js',
-        ],
+        assets: ['bundle-url.js', 'esmodule-helpers.js', 'url.js'],
       },
       {
         type: 'js',
@@ -247,12 +237,7 @@ describe('atlaspack', function () {
     assertBundles(b, [
       {
         name: 'worklet-pipeline.js',
-        assets: [
-          'bundle-url.js',
-          'bundle-url-common.js',
-          'bundle-manifest.js',
-          'worklet-pipeline.js',
-        ],
+        assets: ['bundle-url.js', 'bundle-manifest.js', 'worklet-pipeline.js'],
       },
       {
         type: 'js',
diff --git a/packages/runtimes/js/package.json b/packages/runtimes/js/package.json
index d82b33e51..9088c4539 100644
--- a/packages/runtimes/js/package.json
+++ b/packages/runtimes/js/package.json
@@ -17,6 +17,7 @@
   },
   "dependencies": {
     "@atlaspack/diagnostic": "2.12.0",
+    "@atlaspack/domain-sharding": "2.12.0",
     "@atlaspack/feature-flags": "2.12.0",
     "@atlaspack/plugin": "2.12.0",
     "@atlaspack/utils": "2.12.0",
diff --git a/packages/runtimes/js/src/JSRuntime.js b/packages/runtimes/js/src/JSRuntime.js
index c67c1732f..0c6c7f606 100644
--- a/packages/runtimes/js/src/JSRuntime.js
+++ b/packages/runtimes/js/src/JSRuntime.js
@@ -485,11 +485,23 @@ function getLoaderRuntime({
       return `Promise.resolve(__parcel__require__("./" + ${relativePathExpr}))`;
     }
 
-    let absoluteUrlExpr = shouldUseRuntimeManifest(bundle, options)
-      ? `require('./helpers/bundle-manifest').resolve(${JSON.stringify(
-          to.publicId,
-        )})`
-      : getAbsoluteUrlExpr(relativePathExpr, bundle, to, shardingConfig);
+    let absoluteUrlExpr;
+    if (shouldUseRuntimeManifest(bundle, options)) {
+      let publicId = JSON.stringify(to.publicId);
+      absoluteUrlExpr = `require('./helpers/bundle-manifest').resolve(${publicId})`;
+
+      if (shardingConfig) {
+        absoluteUrlExpr = `require('@atlaspack/domain-sharding').shardUrl(${absoluteUrlExpr}, ${shardingConfig.maxShards})`;
+      }
+    } else {
+      absoluteUrlExpr = getAbsoluteUrlExpr(
+        relativePathExpr,
+        bundle,
+        to,
+        shardingConfig,
+      );
+    }
+
     let code = `require(${JSON.stringify(loader)})(${absoluteUrlExpr})`;
 
     // In development, clear the require cache when an error occurs so the
@@ -732,6 +744,9 @@ function getURLRuntime(
     } else {
       code += `let bundleURL = require('./helpers/bundle-url');\n`;
       code += `let url = bundleURL.getBundleURL('${from.publicId}') + ${relativePathExpr};`;
+      if (shardingConfig) {
+        code += `url = require('@atlaspack/domain-sharding').shardUrl(url, ${shardingConfig.maxShards});`;
+      }
       code += `module.exports = workerURL(url, bundleURL.getOrigin(url), ${String(
         from.env.outputFormat === 'esmodule',
       )});`;
@@ -827,11 +842,13 @@ function getAbsoluteUrlExpr(
     return `new __parcel__URL__(${relativePathExpr}).toString()`;
   }
 
-  if (shardingConfig) {
-    return `require('./helpers/bundle-url-shards').getShardedBundleURL('${toBundle.name}', ${shardingConfig.maxShards}) + ${relativePathExpr}`;
+  const regularBundleUrl = `require('./helpers/bundle-url').getBundleURL('${fromBundle.publicId}') + ${relativePathExpr}`;
+
+  if (!shardingConfig) {
+    return regularBundleUrl;
   }
 
-  return `require('./helpers/bundle-url').getBundleURL('${fromBundle.publicId}') + ${relativePathExpr}`;
+  return `require('@atlaspack/domain-sharding').shardUrl(${regularBundleUrl}, ${shardingConfig.maxShards})`;
 }
 
 function shouldUseRuntimeManifest(
diff --git a/packages/runtimes/js/src/helpers/bundle-url-common.js b/packages/runtimes/js/src/helpers/bundle-url-common.js
deleted file mode 100644
index 8a44855a8..000000000
--- a/packages/runtimes/js/src/helpers/bundle-url-common.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/** 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('/')) + '/';
-}
-
-const stackTraceUrlRegexp =
-  /(https?|file|ftp|(chrome|moz|safari-web)-extension):\/\/[^)\n]+/g;
-
-exports.getBaseURL = getBaseURL;
-exports.stackTraceUrlRegexp = stackTraceUrlRegexp;
diff --git a/packages/runtimes/js/src/helpers/bundle-url-shards.js b/packages/runtimes/js/src/helpers/bundle-url-shards.js
deleted file mode 100644
index c9667bc11..000000000
--- a/packages/runtimes/js/src/helpers/bundle-url-shards.js
+++ /dev/null
@@ -1,99 +0,0 @@
-const {getBaseURL, stackTraceUrlRegexp} = require('./bundle-url-common');
-
-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) {
-    return value;
-  }
-
-  try {
-    throw inputError ?? new Error();
-  } catch (err) {
-    var matches = ('' + err.stack).match(stackTraceUrlRegexp);
-
-    if (!matches) {
-      return '/';
-    }
-
-    // The first stack frame will be this function.
-    // Use the 2nd one, which will be a runtime in the original bundle.
-    const stackUrl = matches[1];
-    const baseUrl = getBaseURL(stackUrl);
-
-    // Global variable is set by SSR servers when HTTP1.1 traffic is detected
-    if (!globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS) {
-      bundleURL[bundleName] = baseUrl;
-      return baseUrl;
-    }
-
-    const shardNumber = getDomainShardIndex(bundleName, maxShards);
-    const url = new URL(baseUrl);
-
-    const shardedDomain = getShardedDomain(url.hostname, shardNumber);
-    url.hostname = shardedDomain;
-
-    value = url.toString();
-
-    bundleURL[bundleName] = value;
-    return value;
-  }
-}
-
-function getDomainShardIndex(str, maxShards) {
-  let shard = str.split('').reduce((a, b) => {
-    const n = (a << maxShards) - a + b.charCodeAt(0);
-
-    // The value returned by << is 64 bit, the & operator coerces to 32,
-    // prevents overflow as we iterate.
-    return n & n;
-  }, 0);
-
-  shard = shard % maxShards;
-
-  // Make number positive
-  if (shard < 0) {
-    shard += maxShards;
-  }
-
-  return shard;
-}
-
-function getShardedDomain(domain, shard) {
-  let i = domain.indexOf('.');
-
-  // Domains like localhost have no . separators
-  if (i === -1) {
-    return `${removeTrailingShard(domain)}-${shard}`;
-  }
-
-  // If this domain already has a shard number in it, strip it out before adding
-  // the new one
-  const firstSubdomain = removeTrailingShard(domain.slice(0, i));
-
-  return `${firstSubdomain}-${shard}${domain.slice(i)}`;
-}
-
-const trailingShardRegex = /-\d+$/;
-
-function removeTrailingShard(subdomain) {
-  if (!trailingShardRegex.test(subdomain)) {
-    return subdomain;
-  }
-
-  const shardIdx = subdomain.lastIndexOf('-');
-  return subdomain.slice(0, shardIdx);
-}
-
-exports.getShardedBundleURL = getShardedBundleURL;
diff --git a/packages/runtimes/js/src/helpers/bundle-url.js b/packages/runtimes/js/src/helpers/bundle-url.js
index bbd4161b3..359e189ad 100644
--- a/packages/runtimes/js/src/helpers/bundle-url.js
+++ b/packages/runtimes/js/src/helpers/bundle-url.js
@@ -1,4 +1,5 @@
-const {getBaseURL, stackTraceUrlRegexp} = require('./bundle-url-common');
+const stackTraceUrlRegexp =
+  /(https?|file|ftp|(chrome|moz|safari-web)-extension):\/\/[^)\n]+/g;
 
 const bundleURL = {};
 
@@ -7,22 +8,33 @@ const bundleURL = {};
  * If the URL is not cached, it computes and stores it in the cache.
  *
  * @param {string} id - The identifier for the bundle.
+ * @param {Error?} inputError - An error object to extract the stack trace from
+ * (for testing purposes).
  * @returns {string} The URL of the bundle, without file name.
  */
-function getBundleURLCached(id) {
+function getBundleURLCached(id, inputError) {
   let value = bundleURL[id];
 
   if (!value) {
-    value = getBundleURL();
+    value = getBundleURL(inputError);
     bundleURL[id] = value;
   }
 
   return value;
 }
 
-function getBundleURL() {
+/** 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('/')) + '/';
+}
+
+function getBundleURL(inputError) {
   try {
-    throw new Error();
+    throw inputError ?? new Error();
   } catch (err) {
     var matches = ('' + err.stack).match(stackTraceUrlRegexp);
     if (matches) {
@@ -43,5 +55,7 @@ function getOrigin(url) {
   return new URL(url).origin;
 }
 
+// TODO: convert this file to ESM once HMR issues are resolved
 exports.getOrigin = getOrigin;
 exports.getBundleURL = getBundleURLCached;
+exports.getBaseURL = getBaseURL;
diff --git a/packages/runtimes/js/test/bundle-url-common.test.js b/packages/runtimes/js/test/bundle-url-common.test.js
deleted file mode 100644
index ede2641d6..000000000
--- a/packages/runtimes/js/test/bundle-url-common.test.js
+++ /dev/null
@@ -1,29 +0,0 @@
-// @flow
-import assert from 'assert';
-
-// $FlowFixMe importing TypeScript
-import {getBaseURL} from '../src/helpers/bundle-url-common';
-
-describe('getBaseUrl', () => {
-  it('should return the URL with the filename removed', () => {
-    const testUrl =
-      'https://bundle-shard-3.assets.example.com/assets/testBundle.123abc.js';
-
-    assert.equal(
-      getBaseURL(testUrl),
-      'https://bundle-shard-3.assets.example.com/assets/',
-    );
-  });
-
-  it('should handle domains with no .', () => {
-    const testUrl = 'http://localhost/assets/testBundle.123abc.js';
-
-    assert.equal(getBaseURL(testUrl), 'http://localhost/assets/');
-  });
-
-  it('should handle domains with ports', () => {
-    const testUrl = 'http://localhost:8081/assets/testBundle.123abc.js';
-
-    assert.equal(getBaseURL(testUrl), 'http://localhost:8081/assets/');
-  });
-});
diff --git a/packages/runtimes/js/test/bundle-url-shards.test.js b/packages/runtimes/js/test/bundle-url-shards.test.js
deleted file mode 100644
index cfd6186ed..000000000
--- a/packages/runtimes/js/test/bundle-url-shards.test.js
+++ /dev/null
@@ -1,132 +0,0 @@
-// @flow
-import assert from 'assert';
-
-import {fsFixture, overlayFS, bundle} from '@atlaspack/test-utils';
-
-// $FlowFixMe importing TypeScript
-import {getShardedBundleURL} from '../src/helpers/bundle-url-shards';
-
-const createErrorStack = (url) => {
-  // This error stack is copied from a local dev, with a bunch
-  // of lines trimmed off the end so it's not unnecessarily long
-  return `
-Error
-    at Object.getShardedBundleURL (http://localhost:8081/main-bundle.1a2fa8b7.js:15688:29)
-    at a7u9v.6d3ceb6ac67fea50 (${url}.1a2fa8b7.js:361466:46)
-    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
-    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
-    at 7H8wc.react-intl-next (http://localhost:8081/main-bundle.1a2fa8b7.js:279746:28)
-    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
-    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
-    at 1nL5S../manifest (http://localhost:8081/main-bundle.1a2fa8b7.js:279714:17)
-    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
-    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
-`.trim();
-};
-
-describe('bundle-url-shards helper', () => {
-  describe('getShardedBundleURL', () => {
-    beforeEach(() => {
-      // $FlowFixMe
-      delete globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS;
-    });
-
-    it('should shard a URL if the global variable is set', () => {
-      const testBundle = 'test-bundle.123abc.js';
-
-      // $FlowFixMe
-      globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS = true;
-
-      const err = new Error();
-      err.stack = createErrorStack(
-        'https://bundle-shard.assets.example.com/assets/ParentBundle.cba321.js',
-      );
-
-      const result = getShardedBundleURL(testBundle, 5, err);
-
-      assert.equal(result, 'https://bundle-shard-0.assets.example.com/assets/');
-    });
-
-    it('should re-shard a domain that has already been sharded', () => {
-      const testBundle = 'TestBundle.1a2b3c.js';
-
-      // $FlowFixMe
-      globalThis.__ATLASPACK_ENABLE_DOMAIN_SHARDS = true;
-
-      const err = new Error();
-      err.stack = createErrorStack(
-        'https://bundle-shard-1.assets.example.com/assets/ParentBundle.cba321.js',
-      );
-
-      const result = getShardedBundleURL(testBundle, 5, err);
-
-      assert.equal(result, 'https://bundle-shard-4.assets.example.com/assets/');
-    });
-
-    it('should not add a shard if the cookie is not present', () => {
-      const testBundle = 'UnshardedBundle.9z8x7y.js';
-
-      const err = new Error();
-      err.stack = createErrorStack(
-        'https://bundle-unsharded.assets.example.com/assets/ParentBundle.cba321.js',
-      );
-
-      const result = getShardedBundleURL(testBundle, 5, err);
-
-      assert.equal(
-        result,
-        'https://bundle-unsharded.assets.example.com/assets/',
-      );
-    });
-  });
-
-  describe('compiled into JS Runtime', () => {
-    it('should insert all arguments into compiled output', async () => {
-      const maxShards = 8;
-      await fsFixture(overlayFS)`
-        package.json:
-          {
-            "name": "bundle-sharding-test",
-            "@atlaspack/runtime-js": {
-              "domainSharding": {
-                "maxShards": ${maxShards}
-              }
-            }
-          }
-
-        src/index.js:
-          async function fn() {
-            const a = await import('./a.js');
-            const b = await import('./b.js');
-            console.log('a', a, b);
-          }
-          fn();
-
-        src/a.js:
-          export const a = async () => {
-            const b = await import('./b');
-            return b + 'A';
-          }
-        src/b.js:
-          export const b = 'B';
-
-        yarn.lock:
-      `;
-
-      const bundleGraph = await bundle('src/index.js', {inputFS: overlayFS});
-
-      const mainBundle = bundleGraph
-        .getBundles()
-        .find((b) => b.name === 'index.js');
-      if (!mainBundle) return assert(mainBundle);
-
-      const code = await overlayFS.readFile(mainBundle.filePath, 'utf-8');
-      assert.ok(
-        code.includes(
-          `require("e3ed71d88565db").getShardedBundleURL('b.8575baaf.js', ${maxShards}) + "b.8575baaf.js"`,
-        ),
-        'Expected generated code for getShardedBundleURL was not found',
-      );
-    });
-  });
-});
diff --git a/packages/runtimes/js/test/bundle-url.test.js b/packages/runtimes/js/test/bundle-url.test.js
new file mode 100644
index 000000000..a48651e8f
--- /dev/null
+++ b/packages/runtimes/js/test/bundle-url.test.js
@@ -0,0 +1,62 @@
+// @flow
+import assert from 'assert';
+
+import {getBaseURL, getBundleURL} from '../src/helpers/bundle-url';
+
+const createErrorStack = (url) => {
+  // This error stack is copied from a local dev, with a bunch
+  // of lines trimmed off the end so it's not unnecessarily long
+  return `
+Error
+    at Object.getBundleURL (http://localhost:8081/main-bundle.1a2fa8b7.js:15688:29)
+    at Object.getBundleURLCached (http://localhost:8081/main-bundle.1a2fa8b7.js:15688:29)
+    at a7u9v.6d3ceb6ac67fea50 (${url}:361466:46)
+    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
+    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
+    at 7H8wc.react-intl-next (http://localhost:8081/main-bundle.1a2fa8b7.js:279746:28)
+    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
+    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
+    at 1nL5S../manifest (http://localhost:8081/main-bundle.1a2fa8b7.js:279714:17)
+    at newRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:71:24)
+    at localRequire (http://localhost:8081/main-bundle.1a2fa8b7.js:84:35)
+`.trim();
+};
+
+describe('getBaseUrl', () => {
+  it('should return the URL with the filename removed', () => {
+    const testUrl =
+      'https://bundle-shard-3.assets.example.com/assets/testBundle.123abc.js';
+
+    assert.equal(
+      getBaseURL(testUrl),
+      'https://bundle-shard-3.assets.example.com/assets/',
+    );
+  });
+
+  it('should handle domains with no .', () => {
+    const testUrl = 'http://localhost/assets/testBundle.123abc.js';
+
+    assert.equal(getBaseURL(testUrl), 'http://localhost/assets/');
+  });
+
+  it('should handle domains with ports', () => {
+    const testUrl = 'http://localhost:8081/assets/testBundle.123abc.js';
+
+    assert.equal(getBaseURL(testUrl), 'http://localhost:8081/assets/');
+  });
+});
+
+describe('getBundleURL', () => {
+  it('should return the URL of the bundle without the file name', () => {
+    const testUrl =
+      'https://bundle-domain.assets.example.com/assets/testBundle.123abc.js';
+
+    const errorStack = createErrorStack(testUrl);
+    const error = new Error();
+    error.stack = errorStack;
+
+    const result = getBundleURL('test-asset', error);
+
+    assert.equal(result, 'https://bundle-domain.assets.example.com/assets/');
+  });
+});
diff --git a/packages/utils/domain-sharding/package.json b/packages/utils/domain-sharding/package.json
new file mode 100644
index 000000000..e915fc903
--- /dev/null
+++ b/packages/utils/domain-sharding/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "@atlaspack/domain-sharding",
+  "version": "2.12.0",
+  "source": "src/index.js",
+  "main": "lib/index.js"
+}
diff --git a/packages/utils/domain-sharding/src/index.js b/packages/utils/domain-sharding/src/index.js
new file mode 100644
index 000000000..b10394b4b
--- /dev/null
+++ b/packages/utils/domain-sharding/src/index.js
@@ -0,0 +1,135 @@
+let globalKeyName = '__ATLASPACK_ENABLE_DOMAIN_SHARDS';
+
+/**
+ * Extracts the file name from a static asset path.
+ * Will throw if the path doesn't have segments or ends in a trailing slash.
+ *
+ * @param {string} pathname
+ * @returns {string}
+ */
+function getFilenameFromUrlPath(pathname) {
+  let lastSlashIdx = pathname.lastIndexOf('/');
+
+  if (lastSlashIdx === -1 || lastSlashIdx === pathname.length - 1) {
+    throw new Error(
+      `Expected an absolute URL with a file name, unable to apply sharding.`,
+    );
+  }
+
+  // Add 1 to skip over the / itself
+  return pathname.slice(lastSlashIdx + 1);
+}
+
+/**
+ * Generates a bounded numeric hash in [0, maxShards)
+ *
+ * @param {string} str
+ * @param {number} maxShards
+ * @returns {number}
+ */
+function getDomainShardIndex(str, maxShards) {
+  let shard = str.split('').reduce((a, b) => {
+    let n = (a << maxShards) - a + b.charCodeAt(0);
+
+    // The value returned by << is 64 bit, the & operator coerces to 32,
+    // prevents overflow as we iterate.
+    return n & n;
+  }, 0);
+
+  shard = shard % maxShards;
+
+  // Make number positive
+  if (shard < 0) {
+    shard += maxShards;
+  }
+
+  return shard;
+}
+
+let trailingShardRegex = /-\d+$/;
+
+/**
+ * @param {string} subdomain
+ */
+function removeTrailingShard(subdomain) {
+  if (!trailingShardRegex.test(subdomain)) {
+    return subdomain;
+  }
+
+  let shardIdx = subdomain.lastIndexOf('-');
+  return subdomain.slice(0, shardIdx);
+}
+
+/**
+ * Given a shard number, inserts that shard in the expected pattern within the
+ * domain
+ *
+ * @param {string} domain
+ * @param {number} shard
+ */
+function applyShardToDomain(domain, shard) {
+  let i = domain.indexOf('.');
+
+  // Domains like localhost have no . separators
+  if (i === -1) {
+    return `${removeTrailingShard(domain)}-${shard}`;
+  }
+
+  // If this domain already has a shard number in it, strip it
+  // out before adding the new one
+  let firstSubdomain = removeTrailingShard(domain.slice(0, i));
+
+  return `${firstSubdomain}-${shard}${domain.slice(i)}`;
+}
+
+/**
+ * Takes an absolute URL and applies a shard to the top level subdomain.
+ * The shard number is based on a hash of the file name, which is
+ * the content after the last / in the URL.
+ *
+ * Unlike `shardUrl`, this function will always apply sharding, without any
+ * conditional logic.
+ *
+ * @param {string} url
+ * @param {number} maxShards
+ * @returns {string}
+ */
+
+function shardUrlUnchecked(url, maxShards) {
+  let parsedUrl = new URL(url);
+
+  let fileName = getFilenameFromUrlPath(parsedUrl.pathname);
+  let shardNumber = getDomainShardIndex(fileName, maxShards);
+
+  parsedUrl.hostname = applyShardToDomain(parsedUrl.hostname, shardNumber);
+
+  return parsedUrl.toString();
+}
+
+/**
+ * Takes an absolute URL and applies a shard to the top level subdomain.
+ * The shard number is based on a hash of the file name, which is
+ * the content after the last / in the URL.
+ *
+ * This function only applies the sharding if the
+ * __ATLASPACK_ENABLE_DOMAIN_SHARDS global variable has been set to true
+ *
+ * @param {string} url
+ * @param {number} maxShards
+ * @returns {string}
+ */
+function shardUrl(url, maxShards) {
+  // Global variable is set by SSR servers when HTTP1.1 traffic is detected
+  if (!globalThis[globalKeyName]) {
+    return url;
+  }
+
+  return shardUrlUnchecked(url, maxShards);
+}
+
+// TODO: convert this file to ESM once HMR issues are resolved
+exports.shardUrl = shardUrl;
+exports.shardUrlUnchecked = shardUrlUnchecked;
+exports.getDomainShardIndex = getDomainShardIndex;
+exports.applyShardToDomain = applyShardToDomain;
+exports.domainShardingKey = globalKeyName;
diff --git a/packages/utils/domain-sharding/test/index.test.js b/packages/utils/domain-sharding/test/index.test.js
new file mode 100644
index 000000000..79b178d6e
--- /dev/null
+++ b/packages/utils/domain-sharding/test/index.test.js
@@ -0,0 +1,79 @@
+// @flow
+import assert from 'assert';
+import {shardUrlUnchecked, shardUrl, domainShardingKey} from '../src/index.js';
+
+describe('domain sharding helpers', () => {
+  beforeEach(() => {
+    // $FlowFixMe
+    delete globalThis[domainShardingKey];
+  });
+
+  describe('shardUrlUnchecked', () => {
+    it('should shard a URL', () => {
+      const testBundle =
+        'https://bundle-shard.assets.example.com/assets/test-bundle.123abc.js';
+
+      const result = shardUrlUnchecked(testBundle, 5);
+
+      assert.equal(
+        result,
+        'https://bundle-shard-0.assets.example.com/assets/test-bundle.123abc.js',
+      );
+    });
+
+    it('should re-shard a domain that has already been sharded', () => {
+      const testBundle =
+        'https://bundle-shard-0.assets.example.com/assets/TestBundle.1a2b3c.js';
+
+      const result = shardUrlUnchecked(testBundle, 5);
+
+      assert.equal(
+        result,
+        'https://bundle-shard-4.assets.example.com/assets/TestBundle.1a2b3c.js',
+      );
+    });
+
+    it('should handle domains with no .', () => {
+      const testBundle = 'http://localhost/assets/testBundle.123abc.js';
+
+      const result = shardUrlUnchecked(testBundle, 5);
+
+      assert.equal(result, 'http://localhost-3/assets/testBundle.123abc.js');
+    });
+
+    it('should handle domains with ports', () => {
+      const testBundle = 'http://localhost:8081/assets/testBundle.123abc.js';
+
+      const result = shardUrlUnchecked(testBundle, 5);
+
+      assert.equal(
+        result,
+        'http://localhost-3:8081/assets/testBundle.123abc.js',
+      );
+    });
+  });
+
+  describe('shardUrl', () => {
+    it('should add a shard if the window property is set', () => {
+      globalThis[domainShardingKey] = true;
+      const testBundle =
+        'https://bundle-shard.assets.example.com/assets/test-bundle.123abc.js';
+
+      const result = shardUrl(testBundle, 5);
+
+      assert.equal(
+        result,
+        'https://bundle-shard-0.assets.example.com/assets/test-bundle.123abc.js',
+      );
+    });
+
+    it('should not add a shard if the window property is not set', () => {
+      const testBundle =
+        'https://bundle-shard.assets.example.com/assets/test-bundle.123abc.js';
+
+      const result = shardUrl(testBundle, 5);
+
+      assert.equal(result, testBundle);
+    });
+  });
+});