Tooling upgrade

.babelrc.js

@@ -0,0 +1,46 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        modules: false,
+      },
+    ],
+    '@babel/preset-react',
+  ],
+  plugins: [
+    'babel-plugin-optimize-clsx',
+    [
+      '@babel/plugin-proposal-class-properties',
+      {
+        loose: true,
+      },
+    ],
+    [
+      '@babel/plugin-proposal-object-rest-spread',
+      {
+        loose: true,
+      },
+    ],
+    // any package needs to declare 7.4.4 as a runtime dependency. default is ^7.0.0
+    [
+      '@babel/plugin-transform-runtime',
+      {
+        version: '^7.4.4',
+      },
+    ],
+    // for IE 11 support
+    '@babel/plugin-transform-object-assign',
+    // material-ui 'productionPlugins'
+    '@babel/plugin-transform-react-constant-elements',
+    'babel-plugin-transform-dev-warning',
+    [
+      'babel-plugin-transform-react-remove-prop-types',
+      {
+        mode: 'unsafe-wrap',
+      },
+    ],
+    // END material-ui 'productionPlugins'
+  ],
+  ignore: [/@babel[\\|/]runtime/], // Fix a Windows issue.
+};

.eslintrc.json

@@ -17,54 +17,64 @@
   "globals": {
     "React": true
   },
+  "settings": {
+    "react": {
+      "version": "15.0"
+    }
+  },
   "plugins": [
     "babel",
     "react"
   ],
   "extends": [
-    "eslint:recommended"
+    "eslint:recommended",
+    "plugin:react/recommended"
   ],
   "rules": {
     "array-bracket-spacing": ["error", "never"],
-    "arrow-spacing": "error",
     "arrow-parens": "error",
+    "arrow-spacing": "error",
     "brace-style": "error",
     "comma-dangle": ["error", "always-multiline"],
     "comma-spacing": ["error", {"before": false, "after": true}],
     "comma-style": ["error", "last"],
     "computed-property-spacing": ["error", "never"],
-    "consistent-this": ["error", "self"],
     "consistent-return": "off",
-    "dot-notation": "error",
+    "consistent-this": ["error", "self"],
     "dot-location": ["error", "property"],
-    "eqeqeq": ["error", "smart"],
+    "dot-notation": "error",
     "eol-last": "error",
-    "indent": ["error", 4, {"SwitchCase": 1}],
+    "eqeqeq": ["error", "smart"],
+    "generator-star-spacing": "error",
     "id-blacklist": ["error", "e"],
+    "indent": ["error", 4, {"SwitchCase": 1}],
     "jsx-quotes": ["error", "prefer-double"],
-    "keyword-spacing": "error",
     "key-spacing": "error",
+    "keyword-spacing": "error",
     "max-len": ["error", 120, 4],
     "new-cap": ["off", {"capIsNew": true, "newIsCap": true}],
-    "no-unused-expressions": "error",
-    "no-unused-vars": "error",
-    "no-shadow": "off",
-    "no-spaced-func": "error",
-    "no-multiple-empty-lines": "error",
-    "no-multi-spaces": "error",
-    "no-undef": "error",
-    "no-empty-pattern": "error",
-    "no-dupe-keys": "error",
+    "no-await-in-loop": "error",
+    "no-case-declarations": "off",
+    "no-cond-assign": "error",
     "no-dupe-args": "error",
+    "no-dupe-keys": "error",
     "no-duplicate-case": "error",
-    "no-cond-assign": "error",
-    "no-extra-semi": "error",
+    "no-empty-pattern": "error",
     "no-extra-boolean-cast": "error",
+    "no-extra-semi": "error",
+    "no-multi-spaces": "error",
+    "no-multiple-empty-lines": "error",
+    "no-shadow": "off",
+    "no-spaced-func": "error",
     "no-trailing-spaces": "error",
+    "no-undef": "error",
     "no-underscore-dangle": "error",
     "no-unneeded-ternary": "error",
     "no-unreachable": "error",
+    "no-unused-expressions": "error",
+    "no-unused-vars": "error",
     "no-var": "error",
+    "object-curly-spacing": ["error", "never"],
     "one-var": ["error", "never"],
     "operator-linebreak": ["error", "after"],
     "padded-blocks": ["error", "never"],
@@ -77,66 +87,9 @@
     "space-infix-ops": "error",
     "space-unary-ops": ["error", {"words": true, "nonwords": false}],
     "spaced-comment": "error",
-    "yoda": "error",
-    "babel/object-curly-spacing": ["error", "never"],
-    "babel/generator-star-spacing": "error",
-    "babel/array-bracket-spacing": "error",
-    "babel/arrow-parens": "error",
-    "babel/no-await-in-loop": "error",
-    "babel/func-params-comma-dangle": "error",
-    "babel/flow-object-type": "error",
-    "react/display-name": "error",
-    "react/jsx-boolean-value": ["error", "always"],
-    "react/jsx-closing-bracket-location": "error",
-    "react/jsx-curly-spacing": "error",
-    "react/jsx-equals-spacing": "error",
-    "react/jsx-filename-extension": ["error", {"extensions": [".js"]}],
-    "react/jsx-first-prop-new-line": ["error", "multiline"],
-    "react/jsx-handler-names": "error",
-    "react/jsx-indent": ["error", 4],
-    "react/jsx-indent-props": ["error", 4],
-    "react/jsx-max-props-per-line": ["error", {"maximum": 3}],
-    "react/jsx-no-comment-textnodes": "error",
-    "react/jsx-no-duplicate-props": "error",
-    "react/jsx-no-undef": "error",
-    "react/jsx-pascal-case": "error",
-    "react/jsx-uses-react": "error",
-    "react/jsx-uses-vars": "error",
-    "react/jsx-wrap-multilines": "error",
-    "react/no-danger": "error",
-    "react/no-deprecated": "error",
-    "react/no-did-mount-set-state": "error",
-    "react/no-did-update-set-state": "error",
-    "react/no-direct-mutation-state": "error",
-    "react/no-multi-comp": "off",
-    "react/no-render-return-value": "error",
-    "react/no-is-mounted": "error",
-    "react/no-unknown-property": "error",
-    "react/prefer-arrow-callback": "off",
-    "react/prefer-es6-class": "error",
-    "react/react-in-jsx-scope": "error",
-    "react/require-render-return": "error",
-    "react/self-closing-comp": "error",
-    "react/sort-comp": "error",
-    "react/no-string-refs": "warn",
-
-    "react/prop-types": "off",
-    "prefer-template": "off",
-    "react/sort-prop-types": "off",
-    "react/jsx-space-before-closing": "off",
     "strict": "off",
-    "react/require-extension": "off",
-    "no-case-declarations": "off",
-    "react/jsx-key": "off",
-    "react/jsx-no-bind": "off",
-    "react/jsx-no-literals": "off",
-    "react/jsx-no-target-blank": "off",
-    "react/jsx-sort-props": "off",
-    "react/no-set-state": "off",
-    "react/forbid-prop-types": "off",
-    "react/prefer-stateless-function": "off",
-    "react/require-optimization": "off",
-    "babel/object-shorthand": "off",
-    "babel/new-cap": "off"
+    "yoda": "error",
+    "babel/new-cap": "off",
+    "babel/object-shorthand": "off"
   }
 }

.size-snapshot.json

@@ -0,0 +1,21 @@
+{
+  "dist/index.js": {
+    "bundled": 29806,
+    "minified": 18686,
+    "gzipped": 4876
+  },
+  "dist/index.es.js": {
+    "bundled": 28544,
+    "minified": 17636,
+    "gzipped": 4770,
+    "treeshaked": {
+      "rollup": {
+        "code": 13846,
+        "import_statements": 1544
+      },
+      "webpack": {
+        "code": 16388
+      }
+    }
+  }
+}