fix(astro,nuxt,react-router,tanstack-react-start,ui,vue): Force .js extension for esm-only packages

Author: dstaley

packages/astro/tsdown.config.mts

@@ -27,6 +27,7 @@ export default defineConfig(overrideOptions => {
     },
     sourcemap: true,
     format: ['esm'],
+    fixedExtension: false,
     external: ['astro', 'react', 'react-dom', 'node:async_hooks', '#async-local-storage', 'astro:transitions/client'],
   };
 });

packages/nuxt/tsdown.config.ts

@@ -21,6 +21,7 @@ export default defineConfig(overrideOptions => {
       './src/runtime/types/index.ts',
     ],
     format: ['esm'],
+    fixedExtension: false,
     // Make sure to not bundle the imports
     // or else the Nuxt module will not be able to resolve them
     unbundle: true,

packages/react-router/tsdown.config.ts

@@ -9,6 +9,7 @@ export default defineConfig(overrideOptions => {
 
   return {
     format: 'esm',
+    fixedExtension: false,
     outDir: './dist',
     entry: ['./src/**/*.{ts,tsx,js,jsx}', '!./src/**/*.test.{ts,tsx}'],
     bundle: true,

packages/tanstack-react-start/tsdown.config.mts

@@ -14,6 +14,7 @@ export default defineConfig(overrideOptions => {
     sourcemap: true,
     treeshake: true,
     format: 'esm',
+    fixedExtension: false,
     outDir: './dist',
     dts: true,
     define: {

packages/ui/tsdown.config.mts

@@ -13,6 +13,7 @@ export default defineConfig(({ watch }) => {
     platform: 'browser',
     external: ['react', 'react-dom', '@clerk/localizations', '@clerk/shared'],
     format: ['esm'], // ESM only
+    fixedExtension: false,
     minify: false,
     plugins: [
       svgr({

packages/vue/tsdown.config.ts

@@ -11,6 +11,7 @@ export default defineConfig(overrideOptions => {
     clean: true,
     entry: ['./src/index.ts', './src/experimental.ts', './src/internal.ts', './src/errors.ts', './src/types/index.ts'],
     format: ['esm'],
+    fixedExtension: false,
     sourcemap: true,
     minify: false,
     dts: false,