@futuredapp/eslint-config-typescript

Eslint setup

Install packages

npm install eslint prettier eslint-config-prettier @typescript-eslint/parser @typescript-eslint/eslint-plugin --save-dev

or

yarn add eslint prettier eslint-config-prettier @typescript-eslint/parser @typescript-eslint/eslint-plugin --dev

Eslint config file

Create .eslintrc.js file with content:

const { resolve } = require('path')

module.exports = {
  parserOptions: {
    parser: '@typescript-eslint/parser',
    project: resolve(__dirname, './tsconfig.json'),
    tsconfigRootDir: __dirname,
    ecmaVersion: 12,
    sourceType: 'module'
  },
  env: {
    browser: false,
    es2021: true,
    node: true
  },
  extends: [
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'prettier',
    '@futuredapp/eslint-config-typescript'
  ],
  plugins: [
    '@typescript-eslint'
  ],
  globals: {
    process: true
  },
  ignorePatterns: ['.eslintrc.js']
}

Prettier config file

Create .prettierrc with content:

{
  "singleQuote": true,
  "semi": false,
  "printWidth": 120,
  "useTabs": false,
  "trailingComma": "all"
}

Typescript config file

Create or update existing tsconfig.json with content:

{
  "compilerOptions": {
    "target": "ES2020",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "allowJs": false,                         /* Allow javascript files to be compiled. */
    "outDir": "./dist",                       /* Redirect output structure to the directory. */
    "strict": true,                           /* Enable all strict type-checking options. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "skipLibCheck": true,                     /* Skip type checking of declaration files. */
    "forceConsistentCasingInFileNames": true, /* Disallow inconsistently-cased references to the same file. */
    "sourceMap": true
  },
  "include": ["./src/**/*", "./index.ts"],
  "exclude": ["node_modules"]
}