fix: postbuild script

package.json

@@ -7,7 +7,8 @@
 		"test": "jest --pass-with-no-tests",
 		"test:ci": "jest --no-stack-trace --verbose --pass-with-no-tests",
 		"prebuild": "npm run lint",
-		"build": "tsup --format cjs --clean && tsup --dts --format esm",
+		"build": "tsup",
+		"postbuild": "node scripts/postbuild.mjs",
 		"lint": "eslint src --ext mjs,js,ts",
 		"lint:fix": "eslint src --ext mjs,js,ts --fix",
 		"format": "prettier --write **/*.{ts,js,json,yml,yaml}",

scripts/postbuild.mjs

@@ -0,0 +1,7 @@
+import { readFile, writeFile } from 'node:fs/promises';
+
+const data = await readFile('./dist/index.mjs', 'utf-8');
+await writeFile(
+	'./dist/index.mjs',
+	`import{createRequire as topLevelCreateRequire}from"module";const require=topLevelCreateRequire(import.meta.url);${data}`,
+);

tsup.config.ts

@@ -1,17 +1,12 @@
 import { defineConfig } from 'tsup';
 
-export default defineConfig((options) => {
-	return {
-		banner: {
-			js:
-				options.format[0] === 'esm'
-					? 'import{resolve as requireResolve}from"path";import{createRequire as topLevelCreateRequire}from"module";const require=topLevelCreateRequire(requireResolve(""));'
-					: '',
-		},
-		entryPoints: ['src/index.ts'],
-		minify: true,
-		skipNodeModulesBundle: true,
-		sourcemap: true,
-		target: 'es2021',
-	};
+export default defineConfig({
+	clean: true,
+	dts: true,
+	entryPoints: ['src/index.ts'],
+	format: ['esm', 'cjs'],
+	minify: true,
+	skipNodeModulesBundle: true,
+	sourcemap: true,
+	target: 'es2021',
 });