fix: ensure filename for esm format (#364)

egoist · Jun 21, 2020 · fe897b2 · fe897b2 · vercel · Jun 21, 2020
1 parent 4aae8f0
commit fe897b2
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/index.ts b/src/index.ts
@@ -457,12 +457,16 @@ export class Bundler {
       typeof getFileName === 'function'
         ? getFileName({ format: rollupFormat, minify }, defaultFileName)
         : getFileName
-    const fileName = fileNameTemplate
+    let fileName = fileNameTemplate
       .replace(/\[min\]/, minPlaceholder)
       // The `[ext]` placeholder no longer makes sense
       // Since we only output to `.js` now
       // Probably remove it in the future
       .replace(/\[ext\]/, '.js')
+
+    if (rollupFormat === 'esm')  {
+      fileName = fileName.replace(/\[format\]/, 'esm')
+    }
 
     return {
       inputConfig: {