feat: package is now ESM (#280)

BREAKING CHANGE: package is now ESM

README.md

@@ -44,8 +44,7 @@ Node
 Install with <code>npm install @octokit/auth-unauthenticated</code>
 
 ```js
-const { createUnauthenticatedAuth } = require("@octokit/auth-unauthenticated");
-// or: import { createUnauthenticatedAuth } from "@octokit/auth-unauthenticated";
+import { createUnauthenticatedAuth } from "@octokit/auth-unauthenticated";
 ```
 
 </td></tr>

package.json

@@ -3,14 +3,15 @@
   "publishConfig": {
     "access": "public"
   },
+  "type": "module",
   "version": "0.0.0-development",
   "description": "GitHub API token authentication for browsers and Node.js",
   "scripts": {
     "build": "node scripts/build.mjs && tsc -p tsconfig.json",
     "lint": "prettier --check 'src/**/*.ts' 'test/**/*.ts' '*.md' package.json",
     "lint:fix": "prettier --write 'src/**/*.ts' 'test/**/*.ts' '*.md' package.json",
     "pretest": "npm run lint -s",
-    "test": "jest --coverage"
+    "test": "NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" npx jest --coverage"
   },
   "repository": "github:octokit/auth-unauthenticated.js",
   "keywords": [
@@ -22,13 +23,13 @@
   "author": "Gregor Martynus (https://github.com/gr2m)",
   "license": "MIT",
   "dependencies": {
-    "@octokit/request-error": "^5.0.0",
+    "@octokit/request-error": "^6.0.1",
     "@octokit/types": "^12.0.0"
   },
   "devDependencies": {
-    "@octokit/core": "^5.0.0",
-    "@octokit/request": "^8.0.2",
-    "@octokit/tsconfig": "^2.0.0",
+    "@octokit/core": "^6.0.0",
+    "@octokit/request": "^9.0.0",
+    "@octokit/tsconfig": "^3.0.0",
     "@types/jest": "^29.0.0",
     "esbuild": "^0.20.0",
     "fetch-mock": "npm:@gr2m/fetch-mock@^9.11.0-pull-request-644.1",
@@ -39,11 +40,15 @@
     "typescript": "^5.0.0"
   },
   "jest": {
+    "extensionsToTreatAsEsm": [
+      ".ts"
+    ],
     "transform": {
       "^.+\\.(ts|tsx)$": [
         "ts-jest",
         {
-          "tsconfig": "test/tsconfig.test.json"
+          "tsconfig": "test/tsconfig.test.json",
+          "useESM": true
         }
       ]
     },

scripts/build.mjs

@@ -12,6 +12,7 @@ const sharedOptions = {
   minify: false,
   allowOverwrite: true,
   packages: "external",
+  format: "esm",
 };
 
 async function main() {
@@ -23,7 +24,6 @@ async function main() {
     outdir: "pkg/dist-src",
     bundle: false,
     platform: "neutral",
-    format: "esm",
     ...sharedOptions,
     sourcemap: false,
   });
@@ -46,8 +46,7 @@ async function main() {
       outdir: "pkg/dist-node",
       bundle: true,
       platform: "node",
-      target: "node14",
-      format: "cjs",
+      target: "node18",
       ...sharedOptions,
     }),
     // Build an ESM browser bundle
@@ -56,7 +55,6 @@ async function main() {
       outdir: "pkg/dist-web",
       bundle: true,
       platform: "browser",
-      format: "esm",
       ...sharedOptions,
     }),
   ]);
@@ -78,10 +76,22 @@ async function main() {
       {
         ...pkg,
         files: ["dist-*/**", "bin/**"],
-        main: "dist-node/index.js",
-        module: "dist-web/index.js",
-        types: "dist-types/index.d.ts",
-        source: "dist-src/index.js",
+        exports: {
+          ".": {
+            node: {
+              types: "./dist-types/index.d.ts",
+              import: "./dist-node/index.js",
+            },
+            browser: {
+              types: "./dist-types/web.d.ts",
+              import: "./dist-web/index.js",
+            },
+            default: {
+              types: "./dist-types/index.d.ts",
+              import: "./dist-node/index.js",
+            },
+          },
+        },
         sideEffects: false,
       },
       null,

test/tsconfig.test.json

@@ -3,7 +3,6 @@
   "compilerOptions": {
     "emitDeclarationOnly": false,
     "noEmit": true,
-    "verbatimModuleSyntax": false,
     "allowImportingTsExtensions": true
   },
   "include": ["src/**/*"]