Moving to ESM only distribution (#644)

Author: RobinTail

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Version 4
+
+### v4.0.0
+
+- The package is now distributed as ESM only.
+
 ## Version 3
 
 ### v3.5.0

package.json

@@ -13,7 +13,7 @@
     "lint": "bun run biome check",
     "test": "bun run --cwd packages/merge-sx test",
     "intTest": "tsc -p packages/integration-test && bun test --filter integration-test",
-    "mdfix": "bunx --bun prettier packages/merge-sx/*.md --write",
+    "mdfix": "bunx --bun prettier ./**/*.md --write",
     "version": "bun run tools/version.ts"
   },
   "devDependencies": {

packages/merge-sx/package.json

@@ -2,20 +2,14 @@
   "name": "merge-sx",
   "version": "3.5.0",
   "description": "Combines multiple SxProps for Material UI components.",
-  "main": "dist/index.cjs",
+  "main": "dist/index.js",
   "module": "dist/index.js",
   "types": "dist/index.d.ts",
   "type": "module",
   "exports": {
     ".": {
-      "import": {
-        "types": "./dist/index.d.ts",
-        "default": "./dist/index.js"
-      },
-      "require": {
-        "types": "./dist/index.d.cts",
-        "default": "./dist/index.cjs"
-      }
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
     }
   },
   "files": [

packages/merge-sx/tsdown.config.ts

@@ -3,7 +3,7 @@ import { defineConfig } from "tsdown";
 export default defineConfig({
   entry: ["./src/index.ts"],
   outDir: "dist",
-  format: ["esm", "cjs"],
+  format: "esm",
   clean: true,
   platform: "browser",
   dts: true,
@@ -12,5 +12,5 @@ export default defineConfig({
   deps: {
     neverBundle: ["csstype", "@mui/system"],
   },
-  attw: { level: "error" },
+  attw: { level: "error", profile: "esm-only" },
 });