.eslintrc.js

'use strict';

module.exports = {
  // https://eslint.org/docs/user-guide/configuring#configuration-cascading-and-hierarchy
  // This option interrupts the configuration hierarchy at this file
  // Remove this if you have an higher level ESLint config file (it usually happens into a monorepos)
  root: true,

  parserOptions: {
    parser: require.resolve('@typescript-eslint/parser'),
  },

  env: {
    node: true,
    browser: true,
    es2021: true,
  },

  extends: [
    // Base ESLint recommended rules
    // 'eslint:recommended',

    // https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/eslint-plugin#usage
    // ESLint typescript rules
    'plugin:@typescript-eslint/recommended',

    // https://github.com/prettier/eslint-config-prettier#installation
    // usage with Prettier, provided by 'eslint-config-prettier'.
    'prettier',
  ],

  plugins: [
    // required to apply rules which need type information
    '@typescript-eslint',

    // https://github.com/typescript-eslint/typescript-eslint/issues/389#issuecomment-509292674
    // Prettier has not been included as plugin to avoid performance impact
    // add it as an extension for your IDE
  ],

  globals: {
    ga: 'readonly', // Google Analytics
    process: 'readonly',
    chrome: 'readonly',
  },

  rules: {
    'prefer-promise-reject-errors': 'off',

    quotes: ['warn', 'single', { avoidEscape: true }],

    // this rule, if on, would require explicit return type on the `render` function
    '@typescript-eslint/explicit-function-return-type': 'off',

    // in plain CommonJS modules, you can't use `import foo = require('foo')` to pass this rule, so it has to be disabled
    '@typescript-eslint/no-var-requires': 'off',

    // The core 'no-unused-vars' rules (in the eslint:recommended ruleset)
    // does not work with type definitions
    'no-unused-vars': 'off',

    // allow debugger during development only
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
  },
};