fix: properly split CJS and ESM

Author: favna

package.json

@@ -4,15 +4,21 @@
 	"description": "Blazing fast input validation and transformation ⚡",
 	"author": "@sapphire",
 	"license": "MIT",
-	"main": "dist/index.js",
-	"module": "dist/index.mjs",
-	"browser": "dist/index.global.js",
-	"unpkg": "dist/index.global.js",
-	"types": "dist/index.d.ts",
+	"main": "dist/cjs/index.cjs",
+	"module": "dist/esm/index.mjs",
+	"browser": "dist/iife/index.global.js",
+	"unpkg": "dist/iife/index.global.js",
+	"types": "dist/cjs/index.d.ts",
 	"exports": {
-		"types": "./dist/index.d.ts",
-		"import": "./dist/index.mjs",
-		"require": "./dist/index.js"
+		"import": {
+			"types": "./dist/esm/index.d.mts",
+			"default": "./dist/esm/index.mjs"
+		},
+		"require": {
+			"types": "./dist/cjs/index.d.ts",
+			"default": "./dist/cjs/index.cjs"
+		},
+		"browser": "./dist/iife/index.global.js"
 	},
 	"sideEffects": false,
 	"homepage": "https://www.sapphirejs.dev",

tsup.config.ts

@@ -1,18 +1,37 @@
-import { defineConfig } from 'tsup';
 import { nodeModulesPolyfillPlugin } from 'esbuild-plugins-node-modules-polyfill';
+import { defineConfig, type Options } from 'tsup';
 
-export default defineConfig({
+const baseOptions: Options = {
 	clean: true,
 	dts: true,
 	entry: ['src/index.ts'],
-	format: ['esm', 'cjs', 'iife'],
 	minify: false,
 	skipNodeModulesBundle: true,
 	sourcemap: true,
 	target: 'es2020',
 	tsconfig: 'src/tsconfig.json',
 	keepNames: true,
-	globalName: 'SapphireShapeshift',
-	esbuildPlugins: [nodeModulesPolyfillPlugin()],
 	treeshake: true
-});
+};
+
+export default [
+	defineConfig({
+		...baseOptions,
+		outDir: 'dist/cjs',
+		format: 'cjs',
+		outExtension: () => ({ js: '.cjs' })
+	}),
+	defineConfig({
+		...baseOptions,
+		outDir: 'dist/esm',
+		format: 'esm'
+	}),
+	defineConfig({
+		...baseOptions,
+		globalName: 'SapphireShapeshift',
+		esbuildPlugins: [nodeModulesPolyfillPlugin()],
+		dts: false,
+		outDir: 'dist/iife',
+		format: 'iife'
+	})
+];