STEP 4: 하나의 코드로 ESM, CJS 모두 지원하는 라이브러리 만들어보기

lib/build.js

@@ -0,0 +1,28 @@
+import esbuild from "esbuild";
+
+const baseConfig = {
+  entryPoints: ["src/index.js"],
+  outdir: "dist",
+  bundle: true,
+  sourcemap: true,
+};
+
+Promise.all([
+  // 한번은 cjs
+  esbuild.build({
+    ...baseConfig,
+    format: "cjs",
+    outExtension: {
+      ".js": ".cjs",
+    },
+  }),
+
+  // 한번은 esm
+  esbuild.build({
+    ...baseConfig,
+    format: "esm",
+  }),
+]).catch(() => {
+  console.log("Build failed");
+  process.exit(1);
+});

lib/dist/index.cjs

@@ -0,0 +1,32 @@
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+
+// src/index.js
+var src_exports = {};
+__export(src_exports, {
+  add: () => add,
+  divide: () => divide,
+  multiply: () => multiply,
+  subtract: () => subtract
+});
+module.exports = __toCommonJS(src_exports);
+var add = (a, b) => a + b;
+var subtract = (a, b) => a - b;
+var multiply = (a, b) => a * b;
+var divide = (a, b) => a / b;
+//# sourceMappingURL=index.cjs.map

lib/dist/index.cjs.map

@@ -0,0 +1,7 @@
+{
+  "version": 3,
+  "sources": ["../src/index.js"],
+  "sourcesContent": ["const add = (a, b) => a + b;\nconst subtract = (a, b) => a - b;\nconst multiply = (a, b) => a * b;\nconst divide = (a, b) => a / b;\n\nexport { add, subtract, multiply, divide };\n"],
+  "mappings": ";;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,IAAM,MAAM,CAAC,GAAG,MAAM,IAAI;AAC1B,IAAM,WAAW,CAAC,GAAG,MAAM,IAAI;AAC/B,IAAM,WAAW,CAAC,GAAG,MAAM,IAAI;AAC/B,IAAM,SAAS,CAAC,GAAG,MAAM,IAAI;",
+  "names": []
+}

lib/package.json

@@ -1,6 +1,19 @@
 {
   "name": "calculate-utils-test",
   "type": "module",
-  "version": "0.0.0-onlyESM",
-  "main": "src/index.js"
+  "version": "0.0.0-both",
+  "main": "dist/index.js",
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs"
+    }
+  },
+  "files": ["src", "dist"],
+  "scripts": {
+    "build": "node ./build.js"
+  },
+  "devDependencies": {
+    "esbuild": "^0.20.2"
+  }
 }

lib/yarn.lock

@@ -2,3 +2,146 @@
 # yarn lockfile v1
 
 
+"@esbuild/aix-ppc64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/aix-ppc64/-/aix-ppc64-0.20.2.tgz#a70f4ac11c6a1dfc18b8bbb13284155d933b9537"
+  integrity sha512-D+EBOJHXdNZcLJRBkhENNG8Wji2kgc9AZ9KiPr1JuZjsNtyHzrsfLRrY0tk2H2aoFu6RANO1y1iPPUCDYWkb5g==
+
+"@esbuild/android-arm64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-arm64/-/android-arm64-0.20.2.tgz#db1c9202a5bc92ea04c7b6840f1bbe09ebf9e6b9"
+  integrity sha512-mRzjLacRtl/tWU0SvD8lUEwb61yP9cqQo6noDZP/O8VkwafSYwZ4yWy24kan8jE/IMERpYncRt2dw438LP3Xmg==
+
+"@esbuild/android-arm@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-arm/-/android-arm-0.20.2.tgz#3b488c49aee9d491c2c8f98a909b785870d6e995"
+  integrity sha512-t98Ra6pw2VaDhqNWO2Oph2LXbz/EJcnLmKLGBJwEwXX/JAN83Fym1rU8l0JUWK6HkIbWONCSSatf4sf2NBRx/w==
+
+"@esbuild/android-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/android-x64/-/android-x64-0.20.2.tgz#3b1628029e5576249d2b2d766696e50768449f98"
+  integrity sha512-btzExgV+/lMGDDa194CcUQm53ncxzeBrWJcncOBxuC6ndBkKxnHdFJn86mCIgTELsooUmwUm9FkhSp5HYu00Rg==
+
+"@esbuild/darwin-arm64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/darwin-arm64/-/darwin-arm64-0.20.2.tgz#6e8517a045ddd86ae30c6608c8475ebc0c4000bb"
+  integrity sha512-4J6IRT+10J3aJH3l1yzEg9y3wkTDgDk7TSDFX+wKFiWjqWp/iCfLIYzGyasx9l0SAFPT1HwSCR+0w/h1ES/MjA==
+
+"@esbuild/darwin-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/darwin-x64/-/darwin-x64-0.20.2.tgz#90ed098e1f9dd8a9381695b207e1cff45540a0d0"
+  integrity sha512-tBcXp9KNphnNH0dfhv8KYkZhjc+H3XBkF5DKtswJblV7KlT9EI2+jeA8DgBjp908WEuYll6pF+UStUCfEpdysA==
+
+"@esbuild/freebsd-arm64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/freebsd-arm64/-/freebsd-arm64-0.20.2.tgz#d71502d1ee89a1130327e890364666c760a2a911"
+  integrity sha512-d3qI41G4SuLiCGCFGUrKsSeTXyWG6yem1KcGZVS+3FYlYhtNoNgYrWcvkOoaqMhwXSMrZRl69ArHsGJ9mYdbbw==
+
+"@esbuild/freebsd-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/freebsd-x64/-/freebsd-x64-0.20.2.tgz#aa5ea58d9c1dd9af688b8b6f63ef0d3d60cea53c"
+  integrity sha512-d+DipyvHRuqEeM5zDivKV1KuXn9WeRX6vqSqIDgwIfPQtwMP4jaDsQsDncjTDDsExT4lR/91OLjRo8bmC1e+Cw==
+
+"@esbuild/linux-arm64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-arm64/-/linux-arm64-0.20.2.tgz#055b63725df678379b0f6db9d0fa85463755b2e5"
+  integrity sha512-9pb6rBjGvTFNira2FLIWqDk/uaf42sSyLE8j1rnUpuzsODBq7FvpwHYZxQ/It/8b+QOS1RYfqgGFNLRI+qlq2A==
+
+"@esbuild/linux-arm@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-arm/-/linux-arm-0.20.2.tgz#76b3b98cb1f87936fbc37f073efabad49dcd889c"
+  integrity sha512-VhLPeR8HTMPccbuWWcEUD1Az68TqaTYyj6nfE4QByZIQEQVWBB8vup8PpR7y1QHL3CpcF6xd5WVBU/+SBEvGTg==
+
+"@esbuild/linux-ia32@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-ia32/-/linux-ia32-0.20.2.tgz#c0e5e787c285264e5dfc7a79f04b8b4eefdad7fa"
+  integrity sha512-o10utieEkNPFDZFQm9CoP7Tvb33UutoJqg3qKf1PWVeeJhJw0Q347PxMvBgVVFgouYLGIhFYG0UGdBumROyiig==
+
+"@esbuild/linux-loong64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-loong64/-/linux-loong64-0.20.2.tgz#a6184e62bd7cdc63e0c0448b83801001653219c5"
+  integrity sha512-PR7sp6R/UC4CFVomVINKJ80pMFlfDfMQMYynX7t1tNTeivQ6XdX5r2XovMmha/VjR1YN/HgHWsVcTRIMkymrgQ==
+
+"@esbuild/linux-mips64el@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-mips64el/-/linux-mips64el-0.20.2.tgz#d08e39ce86f45ef8fc88549d29c62b8acf5649aa"
+  integrity sha512-4BlTqeutE/KnOiTG5Y6Sb/Hw6hsBOZapOVF6njAESHInhlQAghVVZL1ZpIctBOoTFbQyGW+LsVYZ8lSSB3wkjA==
+
+"@esbuild/linux-ppc64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-ppc64/-/linux-ppc64-0.20.2.tgz#8d252f0b7756ffd6d1cbde5ea67ff8fd20437f20"
+  integrity sha512-rD3KsaDprDcfajSKdn25ooz5J5/fWBylaaXkuotBDGnMnDP1Uv5DLAN/45qfnf3JDYyJv/ytGHQaziHUdyzaAg==
+
+"@esbuild/linux-riscv64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-riscv64/-/linux-riscv64-0.20.2.tgz#19f6dcdb14409dae607f66ca1181dd4e9db81300"
+  integrity sha512-snwmBKacKmwTMmhLlz/3aH1Q9T8v45bKYGE3j26TsaOVtjIag4wLfWSiZykXzXuE1kbCE+zJRmwp+ZbIHinnVg==
+
+"@esbuild/linux-s390x@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-s390x/-/linux-s390x-0.20.2.tgz#3c830c90f1a5d7dd1473d5595ea4ebb920988685"
+  integrity sha512-wcWISOobRWNm3cezm5HOZcYz1sKoHLd8VL1dl309DiixxVFoFe/o8HnwuIwn6sXre88Nwj+VwZUvJf4AFxkyrQ==
+
+"@esbuild/linux-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/linux-x64/-/linux-x64-0.20.2.tgz#86eca35203afc0d9de0694c64ec0ab0a378f6fff"
+  integrity sha512-1MdwI6OOTsfQfek8sLwgyjOXAu+wKhLEoaOLTjbijk6E2WONYpH9ZU2mNtR+lZ2B4uwr+usqGuVfFT9tMtGvGw==
+
+"@esbuild/netbsd-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/netbsd-x64/-/netbsd-x64-0.20.2.tgz#e771c8eb0e0f6e1877ffd4220036b98aed5915e6"
+  integrity sha512-K8/DhBxcVQkzYc43yJXDSyjlFeHQJBiowJ0uVL6Tor3jGQfSGHNNJcWxNbOI8v5k82prYqzPuwkzHt3J1T1iZQ==
+
+"@esbuild/openbsd-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/openbsd-x64/-/openbsd-x64-0.20.2.tgz#9a795ae4b4e37e674f0f4d716f3e226dd7c39baf"
+  integrity sha512-eMpKlV0SThJmmJgiVyN9jTPJ2VBPquf6Kt/nAoo6DgHAoN57K15ZghiHaMvqjCye/uU4X5u3YSMgVBI1h3vKrQ==
+
+"@esbuild/sunos-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/sunos-x64/-/sunos-x64-0.20.2.tgz#7df23b61a497b8ac189def6e25a95673caedb03f"
+  integrity sha512-2UyFtRC6cXLyejf/YEld4Hajo7UHILetzE1vsRcGL3earZEW77JxrFjH4Ez2qaTiEfMgAXxfAZCm1fvM/G/o8w==
+
+"@esbuild/win32-arm64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-arm64/-/win32-arm64-0.20.2.tgz#f1ae5abf9ca052ae11c1bc806fb4c0f519bacf90"
+  integrity sha512-GRibxoawM9ZCnDxnP3usoUDO9vUkpAxIIZ6GQI+IlVmr5kP3zUq+l17xELTHMWTWzjxa2guPNyrpq1GWmPvcGQ==
+
+"@esbuild/win32-ia32@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-ia32/-/win32-ia32-0.20.2.tgz#241fe62c34d8e8461cd708277813e1d0ba55ce23"
+  integrity sha512-HfLOfn9YWmkSKRQqovpnITazdtquEW8/SoHW7pWpuEeguaZI4QnCRW6b+oZTztdBnZOS2hqJ6im/D5cPzBTTlQ==
+
+"@esbuild/win32-x64@0.20.2":
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/@esbuild/win32-x64/-/win32-x64-0.20.2.tgz#9c907b21e30a52db959ba4f80bb01a0cc403d5cc"
+  integrity sha512-N49X4lJX27+l9jbLKSqZ6bKNjzQvHaT8IIFUy+YIqmXQdjYCToGWwOItDrfby14c78aDd5NHQl29xingXfCdLQ==
+
+esbuild@^0.20.2:
+  version "0.20.2"
+  resolved "https://registry.yarnpkg.com/esbuild/-/esbuild-0.20.2.tgz#9d6b2386561766ee6b5a55196c6d766d28c87ea1"
+  integrity sha512-WdOOppmUNU+IbZ0PaDiTst80zjnrOkyJNHoKupIcVyU8Lvla3Ugx94VzkQ32Ijqd7UhHJy75gNWDMUekcrSJ6g==
+  optionalDependencies:
+    "@esbuild/aix-ppc64" "0.20.2"
+    "@esbuild/android-arm" "0.20.2"
+    "@esbuild/android-arm64" "0.20.2"
+    "@esbuild/android-x64" "0.20.2"
+    "@esbuild/darwin-arm64" "0.20.2"
+    "@esbuild/darwin-x64" "0.20.2"
+    "@esbuild/freebsd-arm64" "0.20.2"
+    "@esbuild/freebsd-x64" "0.20.2"
+    "@esbuild/linux-arm" "0.20.2"
+    "@esbuild/linux-arm64" "0.20.2"
+    "@esbuild/linux-ia32" "0.20.2"
+    "@esbuild/linux-loong64" "0.20.2"
+    "@esbuild/linux-mips64el" "0.20.2"
+    "@esbuild/linux-ppc64" "0.20.2"
+    "@esbuild/linux-riscv64" "0.20.2"
+    "@esbuild/linux-s390x" "0.20.2"
+    "@esbuild/linux-x64" "0.20.2"
+    "@esbuild/netbsd-x64" "0.20.2"
+    "@esbuild/openbsd-x64" "0.20.2"
+    "@esbuild/sunos-x64" "0.20.2"
+    "@esbuild/win32-arm64" "0.20.2"
+    "@esbuild/win32-ia32" "0.20.2"
+    "@esbuild/win32-x64" "0.20.2"

test/package.json

@@ -10,6 +10,6 @@
     "test:esm": "node ./src/test.js"
   },
   "dependencies": {
-    "calculate-utils-test": "0.0.0-onlyESM"
+    "calculate-utils-test": "^0.0.0-both"
   }
 }

test/yarn.lock

@@ -2,7 +2,7 @@
 # yarn lockfile v1
 
 
-calculate-utils-test@0.0.0-onlyESM:
-  version "0.0.0-onlyESM"
-  resolved "https://registry.yarnpkg.com/calculate-utils-test/-/calculate-utils-test-0.0.0-onlyESM.tgz#df1efd69ab5a2fec738c9b4e032317cd7b4275c4"
-  integrity sha512-vAHy6AAXhhDFhcDHuJzxW7MBJsJsqkDp9DNynW9PpS+br62iws/D+4i6XFS3wr12XPPcnmU3cclAqVI4O4yj3Q==
+calculate-utils-test@^0.0.0-both:
+  version "0.0.0-both"
+  resolved "https://registry.yarnpkg.com/calculate-utils-test/-/calculate-utils-test-0.0.0-both.tgz#16bb743759b278efb0663118ba9caea51455064e"
+  integrity sha512-v7nQt5EKcoP1O5CRd+MHmG0vBD6PoE9RSgzaWzmbgUNxyIXqKHIWfj+vzeZee7i/5idbyzOCxRzMdrLOFjuC6Q==