rework build system to use esbuild.

.eslintrc.js

@@ -1,55 +1,39 @@
 module.exports = {
   "env": {
-    "es6": true,
-    "browser": true
+    "es2015": true,
+    "browser": true,
+    "node": true
   },
-
-  "parser": "babel-eslint",
-
+  "extends": [
+    "eslint:recommended",
+    "plugin:react/recommended",
+    "plugin:react/jsx-runtime",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "overrides": [
+    {
+      "env": {
+        "node": true
+      },
+      "files": [
+        ".eslintrc.{js,cjs}"
+      ],
+      "parserOptions": {
+        "sourceType": "script"
+      }
+    }
+  ],
+  "parser": "@typescript-eslint/parser",
   "parserOptions": {
-    "ecmaVersion": 7,
-    "ecmaFeatures": {
-      "jsx": true
-    },
+    "ecmaVersion": "latest",
     "sourceType": "module"
   },
-
-  "settings": {
-    "react": {
-      "createClass": "createReactClass",
-      "pragma": "React",
-      "version": "15.0"
-    },
-    "propWrapperFunctions": [ "forbidExtraProps" ],
-    "import/resolver": "webpack"
-  },
-
-  "extends": ["eslint:recommended", "plugin:react/recommended", "plugin:import/recommended", "prettier"],
-
-  "plugins": ["prettier"],
-
-  "globals": {
-    "process": true
-  },
-
+  "plugins": [
+    "@typescript-eslint",
+    "react"
+  ],
   "rules": {
-    "quotes": [0],
-    "comma-dangle": [2, "only-multiline"],
-    "max-len": [1, {"code": 80}],
-    "no-unused-expressions": [0],
-    "no-continue": [0],
-    "no-plusplus": [0],
-    "func-names": [0],
-    "arrow-parens": [0],
-    "space-before-function-paren": [0],
-    "jsx-a11y/no-static-element-interactions": [0],
-    "prettier/prettier": "error",
-    "react/no-find-dom-node": [0],
-    "react/jsx-closing-bracket-location": [0],
-    "react/require-default-props": 0,
-    "import/no-extraneous-dependencies": [2, {
-      "devDependencies": ["specs/**"]
-    }]
+    "@typescript-eslint/no-unused-vars": "off",
+    "react/no-deprecated": "warn"
   }
-
 }

Makefile

@@ -2,20 +2,23 @@ NODE=$(shell which node 2> /dev/null)
 NPM=$(shell which npm 2> /dev/null)
 YARN=$(shell which yarn 2> /dev/null)
 JQ=$(shell which jq 2> /dev/null)
+ESBUILD=npx esbuild
 
 PKM?=$(if $(YARN),$(YARN),$(shell which npm))
 
-BABEL=./node_modules/.bin/babel
-COVERALLS=./node_modules/coveralls/bin/coveralls.js
 REMOTE="[email protected]:reactjs/react-modal"
 CURRENT_VERSION:=$(shell jq ".version" package.json)
+
+COVERALLS=./node_modules/coveralls/bin/coveralls.js
 COVERAGE?=true
 
 BRANCH=$(shell git rev-parse --abbrev-ref HEAD)
 CURRENT_VERSION:=$(shell jq ".version" package.json)
 
 VERSION:=$(if $(RELEASE),$(shell read -p "Release $(CURRENT_VERSION) -> " V && echo $$V),"HEAD")
 
+ESBUILDFLAGS?=
+
 help: info
 	@echo
 	@echo "Current version: $(CURRENT_VERSION)"
@@ -50,9 +53,6 @@ deps-docs:
 
 # Rules for development
 
-serve:
-	@npm start
-
 tests:
 	@npm run test
 
@@ -76,15 +76,17 @@ docs: build-docs
 
 check-working-tree:
 	@[ -z "`git status -s`" ] && \
-	echo "Stopping publish. There are change to commit or discard." || echo "Worktree is clean."
+	echo "Stopping publish. There are change to commit or discard." || \
+	echo "Worktree is clean."
 
-compile:
-	@echo "[Compiling source]"
-	$(BABEL) src --out-dir lib
+build:
+	@$(NODE) build.mjs
 
-build: compile
-	@echo "[Building dists]"
-	@npx webpack --config ./scripts/webpack.dist.config.js
+build-minified:
+	@$(NODE) build.mjs --minify
+
+serve:
+	@ESBUILDFLAGS="--watch" make -C . -k build
 
 pre-release-commit:
 	git commit --allow-empty -m "Release v$(VERSION)."

build.mjs

@@ -0,0 +1,17 @@
+import * as esbuild from 'esbuild'
+import { nodeExternalsPlugin } from 'esbuild-node-externals';
+
+const minify = Boolean(process.argv.find(option => option == "--minify"));
+
+await esbuild.build({
+  entryPoints: ["src/index.js"],
+  bundle: true,
+  format: "cjs",
+  outfile: `lib/index${minify ? '.min' : ''}.js`,
+  loader: {
+    '.js': 'jsx',
+    '.ts': 'tsx'
+  },
+  minify: minify,
+  plugins: [nodeExternalsPlugin()],
+});