PR React RS Lang

.eslintignore

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+node_modules/

.eslintrc.js

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+module.exports = {
+  globals: {
+    JSX: true,
+  },
+  env: {
+    browser: true,
+    es2021: true,
+    'jest/globals': true,
+    jest: true,
+  },
+  extends: [
+    'plugin:react/recommended',
+    'airbnb',
+    'plugin:jest/recommended',
+    'plugin:prettier/recommended',
+    'prettier',
+  ],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true,
+    },
+    ecmaVersion: 12,
+    sourceType: 'module',
+  },
+  plugins: ['react', '@typescript-eslint', 'jest', 'prettier'],
+  rules: {
+    'import/extensions': 'off',
+    'import/no-unresolved': 'off',
+    'react-hooks/exhaustive-deps': 'off',
+    'no-use-before-define': 'off',
+    '@typescript-eslint/no-use-before-define': ['error'],
+    'max-len': [
+      1,
+      {
+        code: 100,
+      },
+    ],
+    'react/jsx-filename-extension': [
+      2,
+      {
+        extensions: ['.js', '.jsx', '.ts', '.tsx'],
+      },
+    ],
+    'react/destructuring-assignment': [
+      'off',
+      'always',
+      {
+        ignoreClassFields: true,
+      },
+    ],
+    'no-unused-vars': 'off',
+    '@typescript-eslint/no-unused-vars': 'error',
+    'no-shadow': 'off',
+    '@typescript-eslint/no-shadow': 'error',
+    'prettier/prettier': [
+      'error',
+      {
+        endOfLine: 'auto',
+      },
+    ],
+  },
+};

.gitignore

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+# Build
+build/
+
+# IntellijIdea files
+.idea/
+
+# Dependency directories
+node_modules/
+
+.vscode/

.prettierrc

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+{
+  "printWidth": 100,
+  "tabWidth": 2,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "bracketSpacing": true,
+  "jsxBracketSameLine": true,
+  "semi": true,
+  "arrowParens": "always",
+  "useTabs": false,
+  "endOfLine": "auto"
+}

jest.config.ts

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+module.exports = {
+  roots: ['<rootDir>/src'],
+  transform: {
+    '^.+\\.tsx?$': 'ts-jest',
+  },
+  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  snapshotSerializers: ['enzyme-to-json/serializer'],
+  setupFilesAfterEnv: ['<rootDir>/src/setupEnzyme.ts'],
+  moduleNameMapper: {
+    '^.+\\.(css|less|scss)$': 'babel-jest',
+  },
+};