.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2021: true
  },
  extends: 'standard-with-typescript',
  overrides: [
    {
      env: {
        node: true
      },
      files: [
        '.eslintrc.{js,cjs}'
      ],
      parserOptions: {
        sourceType: 'script'
      }
    }
  ],
  parserOptions: {
    ecmaVersion: 'latest',
    sourceType: 'module'
  },
  rules: {
    quotes: ['error', 'single'],
    // we want to force semicolons
    semi: ['error', 'always'],
    // we use 2 spaces to indent our code
    indent: ['error', 2],
    // we want to avoid extraneous spaces
    'no-multi-spaces': ['error'],
    'space-before-function-paren': ['error', {
      anonymous: 'never',
      named: 'never',
      asyncArrow: 'never'
    }],
    eqeqeq: ['error', 'smart'],
    'no-var': ['error'],
    'no-return-assign': ['error', 'always']
  }
};