Add TypeScript support, replace Babel with TypeScript compiler

Author: wojtekmaj

.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": ["@babel/env", "@babel/react"]
+  "presets": ["@babel/typescript", "@babel/env", "@babel/react"]
 }

.eslintrc.json

@@ -1,5 +1,11 @@
 {
-  "extends": "wojtekmaj/react-no-automatic-runtime",
+  "extends": [
+    "wojtekmaj/react-no-automatic-runtime",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
   "overrides": [
     {
       "files": ["sample/**", "test/**"],

index.d.ts

@@ -2,20 +2,26 @@
   "name": "react-date-picker",
   "version": "9.2.0",
   "description": "A date picker for your React app.",
-  "main": "dist/index.js",
+  "main": "dist/cjs/index.js",
+  "module": "dist/esm/index.js",
   "source": "src/index.js",
-  "types": "./index.d.ts",
+  "sideEffects": [
+    "*.css"
+  ],
   "scripts": {
     "build": "yarn build-js && yarn copy-styles",
-    "build-js": "babel src -d dist --ignore \"**/*.spec.js,**/*.spec.jsx\"",
+    "build-js": "yarn build-js-esm && yarn build-js-cjs",
+    "build-js-esm": "tsc --project tsconfig.build.json --outDir dist/esm --module esnext",
+    "build-js-cjs": "tsc --project tsconfig.build.json --outDir dist/cjs --module commonjs",
     "clean": "rimraf dist",
     "copy-styles": "node ./copy-styles.mjs",
     "jest": "jest",
-    "lint": "eslint . --ext .js,.jsx",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
     "postinstall": "husky install",
     "prepack": "yarn clean && yarn build",
     "prettier": "prettier --check . --cache",
-    "test": "yarn lint && yarn prettier && yarn jest"
+    "test": "yarn lint && yarn tsc && yarn prettier && yarn jest",
+    "tsc": "tsc --noEmit"
   },
   "keywords": [
     "calendar",
@@ -41,13 +47,16 @@
     "update-input-width": "^1.2.2"
   },
   "devDependencies": {
-    "@babel/cli": "^7.15.0",
     "@babel/core": "^7.15.0",
     "@babel/preset-env": "^7.15.0",
     "@babel/preset-react": "^7.14.0",
+    "@babel/preset-typescript": "^7.18.6",
     "@testing-library/jest-dom": "^5.15.0",
     "@testing-library/react": "^13.4.0",
     "@testing-library/user-event": "^14.4.0",
+    "@types/jest": "^29.0.0",
+    "@typescript-eslint/eslint-plugin": "^5.41.0",
+    "@typescript-eslint/parser": "^5.44.0",
     "eslint": "^8.26.0",
     "eslint-config-wojtekmaj": "^0.7.1",
     "husky": "^8.0.0",
@@ -57,7 +66,8 @@
     "pretty-quick": "^3.1.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "rimraf": "^3.0.0"
+    "rimraf": "^3.0.0",
+    "typescript": "^4.9.5"
   },
   "peerDependencies": {
     "react": "^16.8.0 || ^17.0.0 || ^18.0.0",

package.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["src/**/*.spec.js", "src/**/*.spec.jsx", "src/**/*.spec.ts", "src/**/*.spec.tsx"]
+}

tsconfig.build.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "allowJs": true,
+    "declaration": false,
+    "downlevelIteration": true,
+    "esModuleInterop": true,
+    "importsNotUsedAsValues": "error",
+    "isolatedModules": true,
+    "jsx": "react",
+    "moduleResolution": "node",
+    "noUncheckedIndexedAccess": true,
+    "outDir": "dist",
+    "strict": true,
+    "strictNullChecks": true,
+    "target": "es5"
+  },
+  "include": ["src"]
+}