Feature/3 create react version

.babelrc

@@ -1,6 +1,14 @@
 // SEE: https://rollupjs.org/guide/en/#babel
 {
+	"plugins": [
+		["transform-inline-environment-variables", {
+			"include": [
+				"NODE_ENV"
+			]
+		}]
+	],
 	"presets": [
-		["@babel/env", {"modules": false }]
+		["@babel/env", {"modules": false }],
+		["@babel/preset-react", {"modules": false }]
 	]
 }

.browserslistrc

@@ -1,3 +1,4 @@
 # Supported Browsers
 
-last 2 versions
+# i.e. "defaults" as of 2019
+> 0.5%, last 2 versions, Firefox ESR, not dead

.eslintrc.json

@@ -0,0 +1,17 @@
+{
+	"env": {
+		"browser": true
+	},
+	"parserOptions": {
+		"ecmaVersion": 2019,
+		"sourceType": "module",
+		"ecmaFeatures": {
+			"jsx": true
+		}
+	},
+	"extends": [
+		"eslint:recommended",
+		"plugin:react/recommended"
+	],
+	"root": true
+}

TODO.md

@@ -0,0 +1,6 @@
+- TODO: Migrate component styles to React components.
+- TODO: Split project into packages:
+  - parent `package.json` (shared code)
+  - children `package.json`'s (app-specific code)
+- TODO: Create test cases for each component.
+  - See [Testing Recipies #Rendering - React](https://reactjs.org/docs/testing-recipes.html#rendering)