feat: add TypeScript support

README.md

@@ -24,12 +24,14 @@ Just **focus** on coding.
   - [React](#react)
   - [Flow](#flow)
   - [Flow with React](#flow-with-react)
+  - [TypeScript](#typescript)
+  - [TypeScript with React](#typescript-with-react)
   - [Vue](#vue)
   - [Node.js](#nodejs)
 - [Existing codebase setup](#existing-codebase-setup)
 - [Setup autofix in IDE](#setup-autofix-in-ide)
 - [Ignoring files](#ignoring-files)
-- [Contibuting](#contibuting)
+- [Contributing](#contributing)
   - [Test](#test)
   - [Release](#release)
 
@@ -158,6 +160,58 @@ module.exports = {
 }
 ```
 
+### TypeScript
+
+**terminal**
+```sh
+yarn add @typescript-eslint/parser @typescript-eslint/eslint-plugin typescript --dev
+```
+
+**.eslintrc.js**
+```js
+module.exports = {
+  extends: 'algolia/typescript'
+};
+```
+
+**package.json**
+```json
+{
+  "scripts": {
+    "test": "npm run lint",
+    "lint": "eslint --ext .js,.ts,.tsx .",
+    "lint:fix": "npm run lint -- --fix"
+  }
+}
+```
+
+### TypeScript with React
+
+**terminal**
+```sh
+yarn add @typescript-eslint/parser @typescript-eslint/eslint-plugin typescript eslint-plugin-react --dev
+```
+
+**.eslintrc.js**
+```js
+module.exports = {
+  extends: ['algolia/react', 'algolia/typescript']
+};
+```
+**Note**: Be sure to put the `algolia/typescript` configuration last so the parser is properly set for TypeScript files.
+
+**package.json**
+```json
+{
+  "scripts": {
+    "test": "npm run lint",
+    "lint": "eslint --ext .js,.ts,.tsx .",
+    "lint:fix": "npm run lint -- --fix"
+  }
+}
+```
+
+
 ### Vue
 
 **terminal**
@@ -244,7 +298,7 @@ Also activate "Lint HTML files" when dealing with `.vue` components.
 
 See "Ignoring Files and Directories" on [ESLint website](http://eslint.org/docs/user-guide/configuring.html#ignoring-files-and-directories).
 
-## Contibuting
+## Contributing
 
 ### Test
 

rules/typescript.js

@@ -0,0 +1,74 @@
+// eslint-disable-next-line import/no-commonjs
+module.exports = {
+  plugins: ['@typescript-eslint'],
+  rules: {
+    '@typescript-eslint/adjacent-overload-signatures': ['error'],
+    '@typescript-eslint/array-type': ['error', 'array-simple'],
+    '@typescript-eslint/ban-types': ['error'],
+    '@typescript-eslint/ban-ts-ignore': ['off'],
+    '@typescript-eslint/camelcase': ['error'],
+    '@typescript-eslint/class-name-casing': ['error'],
+    '@typescript-eslint/explicit-function-return-type': [
+      'error',
+      {
+        allowExpressions: true,
+        allowTypedFunctionExpressions: true,
+      },
+    ],
+    '@typescript-eslint/explicit-member-accessibility': ['error'],
+    '@typescript-eslint/generic-type-naming': ['error', '^T[A-Z][a-zA-Z]+$'],
+    '@typescript-eslint/indent': ['off'],
+    '@typescript-eslint/interface-name-prefix': ['error', 'never'],
+    '@typescript-eslint/member-delimiter-style': ['off'],
+    '@typescript-eslint/member-naming': ['off'],
+    '@typescript-eslint/member-ordering': [
+      'error',
+      {
+        default: ['static-field'],
+      },
+    ],
+    '@typescript-eslint/no-angle-bracket-type-assertion': ['error'],
+    '@typescript-eslint/no-array-constructor': ['error'],
+    '@typescript-eslint/no-empty-interface': ['error'],
+    '@typescript-eslint/no-explicit-any': ['off'],
+    '@typescript-eslint/no-extraneous-class': ['off'],
+    '@typescript-eslint/no-for-in-array': ['off'],
+    '@typescript-eslint/no-inferrable-types': ['off'],
+    '@typescript-eslint/no-misused-new': ['error'],
+    '@typescript-eslint/no-namespace': ['error'],
+    '@typescript-eslint/no-non-null-assertion': ['off'],
+    '@typescript-eslint/no-object-literal-type-assertion': ['off'],
+    '@typescript-eslint/no-parameter-properties': ['off'],
+    '@typescript-eslint/no-require-imports': ['off'],
+    '@typescript-eslint/no-this-alias': ['off'],
+    '@typescript-eslint/no-triple-slash-reference': ['error'],
+    '@typescript-eslint/no-type-alias': ['off'],
+    '@typescript-eslint/no-unnecessary-qualifier': ['off'],
+    '@typescript-eslint/no-unnecessary-type-assertion': ['off'],
+    '@typescript-eslint/no-unused-vars': [
+      'error',
+      {
+        ignoreRestSiblings: true,
+      },
+    ],
+    '@typescript-eslint/no-use-before-define': ['error', { functions: false }],
+    '@typescript-eslint/no-useless-constructor': ['error'],
+    '@typescript-eslint/no-var-requires': ['off'],
+    '@typescript-eslint/prefer-for-of': ['off'],
+    '@typescript-eslint/prefer-function-type': ['error'],
+    '@typescript-eslint/prefer-interface': ['off'],
+    '@typescript-eslint/prefer-namespace-keyword': ['error'],
+    '@typescript-eslint/promise-function-async': ['off'],
+    '@typescript-eslint/restrict-plus-operands': ['off'],
+    '@typescript-eslint/type-annotation-spacing': ['error'],
+    '@typescript-eslint/unbound-method': ['off'],
+    '@typescript-eslint/unified-signatures': ['error'],
+
+    // Disable rules superset by @typescript-eslint
+    'no-unused-vars': ['off'],
+    'no-use-before-define': ['off'],
+    camelcase: ['off'],
+    'no-array-constructor': ['off'],
+    'no-useless-constructor': ['off'],
+  },
+};

typescript.js

@@ -0,0 +1,17 @@
+// eslint-disable-next-line import/no-commonjs
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+    ecmaFeatures: {
+      impliedStrict: true,
+      jsx: true,
+    },
+  },
+  extends: [
+    './base.js',
+    './rules/typescript.js',
+    'prettier/@typescript-eslint',
+  ],
+};