.eslintrc.js

module.exports = {
  root: true,

  parserOptions: {
    parser: "@typescript-eslint/parser"
  },

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

  extends: [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "prettier"
  ],

  plugins: ["@typescript-eslint", "eslint-plugin-tsdoc"],

  rules: {
    "no-console": "error"
  },

  reportUnusedDisableDirectives: true,

  overrides: [
    {
      files: ["*.ts"],
      extends: [
        "plugin:@typescript-eslint/recommended-requiring-type-checking"
      ],
      parserOptions: {
        project: ["./tsconfig.json"]
      },
      rules: {
        "tsdoc/syntax": "error"
      }
    },
    {
      files: ["**/*.spec.ts"],
      plugins: ["jest"],
      rules: {
        // you should turn the original rule off *only* for test files, see https://github.com/jest-community/eslint-plugin-jest/blob/main/docs/rules/unbound-method.md#how-to-use
        "@typescript-eslint/unbound-method": "off",
        "jest/unbound-method": "error"
      }
    },
    {
      files: ["./app/**/*.{js,ts}"],
      parserOptions: {
        project: ["./app/tsconfig.json"]
      }
    },
    {
      files: ["./common/**/*.{js,ts}"],
      parserOptions: {
        project: ["./common/tsconfig.json"]
      }
    },
    {
      files: ["./companion/**/*.{js,ts}"],
      parserOptions: {
        project: ["./companion/tsconfig.json"]
      }
    },
    {
      files: ["./settings/**/*.{js,jsx,ts,tsx}"],
      parserOptions: {
        project: ["./settings/tsconfig.json"]
      }
    }
  ]
}