feat(lib): add basic lib functionality

Author: sudkumar

index.js

@@ -2,18 +2,30 @@
   "name": "eval-num-expr",
   "version": "0.0.3",
   "description": "Evaluate numerical expressions",
-  "main": "index.js",
+  "main": "dist/index.js",
+  "module": "dist/index.es.js",
+  "browser": "dist/index.umd.js",
+  "types": "types/index.d.ts",
   "scripts": {
+    "build": "rollup -c",
     "release": "np --no-2fa"
   },
   "keywords": [],
   "files": [
-    "index.js"
+    "dist"
   ],
   "author": "Sudhir M <https://github.com/sudkumar>",
-  "license": "ISC",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/craftsys/eval-num-expr.git"
+  },
   "devDependencies": {
+    "@rollup/plugin-typescript": "^8.2.1",
     "np": "^7.4.0",
-    "prettier": "^2.2.1"
+    "prettier": "^2.2.1",
+    "rollup": "^2.45.2",
+    "tslib": "^2.2.0",
+    "typescript": "^4.2.4"
   }
 }

package-lock.json

@@ -0,0 +1,25 @@
+import pkg from "./package.json";
+import typescript from "@rollup/plugin-typescript";
+
+export default [
+  // UMD
+  {
+    input: "src/index.ts",
+    output: {
+      name: "evalNumExpr",
+      file: pkg.browser,
+      format: "umd",
+    },
+    plugins: [typescript({ sourceMap: false })],
+  },
+
+  // CommonJS (for Node) and ES module (for bundlers) build.
+  {
+    input: "src/index.ts",
+    output: [
+      { file: pkg.main, format: "cjs", exports: "auto" },
+      { file: pkg.module, format: "es" },
+    ],
+    plugins: [typescript({ sourceMap: false })],
+  },
+];