adjust package build (#86)

Author: copperlight

.gitignore

@@ -1,6 +1,6 @@
 .idea
-build/
 cjs/
+esm/
 coverage/
 node_modules/
 package-lock.json

package.json

@@ -1,15 +1,18 @@
 {
   "name": "nflx-spectator",
-  "version": "3.0.0-rc.3",
+  "version": "3.0.0-rc.4",
   "license": "Apache-2.0",
   "homepage": "https://github.com/Netflix/spectator-js",
   "author": "Netflix Telemetry Engineering <[email protected]>",
   "type": "module",
   "main": "cjs/src/index.js",
-  "module": "build/src/index.js",
   "types": "build/src/index.d.ts",
+  "exports": {
+    "import": "./esm/src/index.js",
+    "require": "./cjs/src/index.js"
+  },
   "files": [
-    "build/src/**/*",
+    "esm/src/**/*",
     "cjs/src/**/*.js"
   ],
   "engines": {
@@ -32,12 +35,12 @@
     "typescript": "^5.8.2"
   },
   "scripts": {
-    "clean": "rm -rf build cjs",
-    "build": "tsc; tsc --outDir cjs --module commonjs",
+    "clean": "rm -rf cjs coverage esm",
+    "build": "tsc --module commonjs --outDir cjs; tsc --module es2022 --outDir esm",
     "build-and-test": "npm run build; npm run test",
     "lint": "eslint 'src/**/*.ts' 'test/**/*.ts'",
-    "test": "mocha 'build/test/**/*.test.js'",
-    "test-with-coverage": "c8 mocha --reporter min 'build/test/**/*.test.js'",
-    "check-coverage": "c8 check-coverage --lines 90 mocha 'build/test/**/*.test.js'"
+    "test": "mocha 'esm/test/**/*.test.js'",
+    "test-with-coverage": "c8 mocha --reporter min 'esm/test/**/*.test.js'",
+    "check-coverage": "c8 check-coverage --lines 90 mocha 'esm/test/**/*.test.js'"
   }
 }

tsconfig.json

@@ -3,7 +3,7 @@
     /* Visit https://aka.ms/tsconfig to read more about this file */
 
     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "es2022",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
 
     /* Modules */
     "module": "nodenext",                                /* Specify what module code is generated. */