ZETA-6125: Benchmarl progress towards building esm module.

package.json

@@ -5,10 +5,14 @@
   ],
   "version": "1.2.2",
   "description": "Code Morph is an extensible, easy to understand, easy contribute, easy to use Codemod library.",
-  "main": "./dist/index.js",
-  "types": "./dist/index.d.ts",
+  "types": "./lib/cjs/types/index.d.ts",
+  "main": "./lib/cjs/index.js",
   "scripts": {
-    "build": "tsc",
+    "clean": "rm -rf ./lib",
+    "build": "npm run clean && npm run build:esm && npm run build:cjs",
+    "build:esm": "tsc -p ./tsconfig.esm.json && mv lib/esm/index.js lib/esm/index.mjs",
+    "build:cjs": "tsc -p ./tsconfig.cjs.json",
+    "prepack": "npm run build",
     "format": "prettier --write \"src/**/*.(js|ts)\"",
     "lint": "eslint src --ext .js,.ts",
     "lint:fix": "eslint src --fix --ext .js,.ts",
@@ -56,6 +60,7 @@
     "@angular/router": "^13.0.0",
     "@angular/service-worker": "^13.0.0",
     "@angular/upgrade": "^13.0.0",
+    "@types/glob": "^8.1.0",
     "@types/jest": "^27.5.2",
     "@types/lodash": "^4.14.192",
     "@types/resolve": "^1.20.2",
@@ -98,7 +103,19 @@
     "unist-util-visit": "2.0.3",
     "unist-util-visit-parents": "3.1.1"
   },
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./lib/esm/types/index.d.ts",
+        "default": "./lib/esm/index.mjs"
+      },
+      "require": {
+        "types": "./lib/cjs/types/index.d.ts",
+        "default": "./lib/cjs/index.js"
+      }
+    }
+  },
   "files": [
-    "dist/**/*"
+    "lib/**/*"
   ]
 }

tsconfig.base.json

@@ -1,19 +1,15 @@
 {
   "compilerOptions": {
-    "target": "es2015",
-    "sourceMap": true,
-    "importHelpers": true,
-    "module": "esnext",
-    "moduleResolution": "node",
-    "outDir": "build",
-    "experimentalDecorators": true,
-    "emitDecoratorMetadata": true,
+    "strict": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": false,
     "skipLibCheck": true,
-    "types": ["node", "jest"],
-    "lib": ["es2021"],
+    "checkJs": true,
+    "allowJs": true,
     "declaration": true,
-    "resolveJsonModule": true,
-    "baseUrl": ".",
-    "rootDir": "."
-  }
-}
+    "declarationMap": true,
+    "types": ["node", "jest"],
+    "allowSyntheticDefaultImports": true
+  },
+  "files": ["./src/index.ts"]
+}

tsconfig.cjs.json

@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "lib": ["ES6", "DOM"],
+    "target": "ES6",
+    "module": "CommonJS",
+    "moduleResolution": "Node",
+    "outDir": "./lib/cjs",
+    "declarationDir": "./lib/cjs/types"
+  }
+}

tsconfig.esm.json

@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "lib": ["ES2021", "DOM"],
+    "target": "ES2021",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "outDir": "./lib/esm",
+    "declarationDir": "./lib/esm/types"
+  }
+}