Calm esm warnings

.changeset/silent-trains-build.md

@@ -0,0 +1,5 @@
+---
+"@remix-run/dev": patch
+---
+
+Don't show ESM warnings when consumed via dynamic import.

integration/esm-only-warning-test.ts

@@ -42,13 +42,17 @@ test.beforeAll(async () => {
         import b from "esm-only-exports";
         import c from "esm-only-sub-exports";
         import d from "esm-cjs-exports";
+        import e from "cjs-dynamic-import";
 
-        export function loader() {
+        export async function loader() {
+          let { default: f } = await import("esm-only-exports-b");
           return json({
             a: a(),
             b: b(),
             c: c(),
             d: d(),
+            e: e(),
+            f: f(),
           });
         }
 
@@ -79,6 +83,40 @@ test.beforeAll(async () => {
       "node_modules/esm-only-exports/index.js": js`
         export default () => "esm-only-no-exports";
       `,
+      "node_modules/esm-only-exports-b/package.json": json({
+        name: "esm-only-exports-b",
+        version: "1.0.0",
+        type: "module",
+        main: "index.js",
+        exports: {
+          ".": "./index.js",
+          "./package.json": "./package.json",
+        },
+      }),
+      "node_modules/esm-only-exports-b/index.js": js`
+        export default () => "esm-only-no-exports-b";
+      `,
+      "node_modules/esm-only-exports-c/package.json": json({
+        name: "esm-only-exports-c",
+        version: "1.0.0",
+        type: "module",
+        main: "index.js",
+        exports: {
+          ".": "./index.js",
+          "./package.json": "./package.json",
+        },
+      }),
+      "node_modules/esm-only-exports-c/index.js": js`
+        export default () => "esm-only-no-exports-c";
+      `,
+      "node_modules/cjs-dynamic-import/package.json": json({
+        name: "cjs-dynamic-import",
+        version: "1.0.0",
+        main: "index.js",
+      }),
+      "node_modules/cjs-dynamic-import/index.js": js`
+        module.exports = async () => "esm-only-no-exports-d" + (await import("esm-only-exports-c")).default();
+      `,
       "node_modules/esm-only-sub-exports/package.json": json({
         name: "esm-only-sub-exports",
         version: "1.0.0",
@@ -143,6 +181,15 @@ test("logs warnings for ESM only packages", async () => {
   expect(buildOutput).toContain(
     "esm-only-exports is possibly an ESM only package"
   );
+  expect(buildOutput).not.toContain(
+    "esm-only-exports-b is possibly an ESM only package"
+  );
+  expect(buildOutput).not.toContain(
+    "esm-only-exports-c is possibly an ESM only package"
+  );
+  expect(buildOutput).not.toContain(
+    "cjs-dynamic-import is possibly an ESM only package"
+  );
   expect(buildOutput).toContain(
     "esm-only-sub-exports is possibly an ESM only package"
   );

packages/remix-dev/compiler/plugins/serverBareModulesPlugin.ts

@@ -36,7 +36,7 @@ export function serverBareModulesPlugin(
   return {
     name: "server-bare-modules",
     setup(build) {
-      build.onResolve({ filter: /.*/ }, ({ importer, path }) => {
+      build.onResolve({ filter: /.*/ }, ({ importer, kind, path }) => {
         // If it's not a bare module ID, bundle it.
         if (!isBareModuleId(resolvePath(path))) {
           return undefined;
@@ -103,6 +103,7 @@ export function serverBareModulesPlugin(
         if (
           onWarning &&
           !isNodeBuiltIn(packageName) &&
+          kind !== "dynamic-import" &&
           (!remixConfig.serverBuildTarget ||
             remixConfig.serverBuildTarget === "node-cjs")
         ) {