.eslintrc.json

{
  "root": true,

  "plugins": [
      "eslint-comments",
      "jest",
      "jest-formatting",
      "jquery",
      "no-only-tests",
      "optimize-regex",
      "prefer-arrow",
      "prefer-object-spread",
      "prettier",
      "promise",
      "simple-import-sort",
      "unicorn",
      "you-dont-need-lodash-underscore"
  ],
  "extends": [
      "eslint:recommended",
      "plugin:eslint-comments/recommended",
      "plugin:jest/recommended",
      "plugin:jest-formatting/recommended",
      "plugin:jquery/deprecated",
      "plugin:optimize-regex/recommended",
      "plugin:promise/recommended",
      "plugin:unicorn/recommended",
      "plugin:you-dont-need-lodash-underscore/compatible"
  ],
  "rules": {
      "no-console": "error",
      "no-alert": "error",
      "no-var": "error",
      "no-use-before-define": "error",
      "prefer-rest-params": "error",
      "prefer-const": "error",
      "prefer-spread": "error",
      "no-only-tests/no-only-tests": "error",
      "prefer-arrow/prefer-arrow-functions": "error",
      "prefer-object-spread/prefer-object-spread": "error",
      "simple-import-sort/imports": "error",
      "prettier/prettier": "error",
      "unicorn/filename-case": "off",
      "unicorn/no-null": "off"
  },
  "overrides": [
      {
          "files": "*.js",
          "parser": "espree",
          "env": { "node": true }
      },
      {
          "files": "**/*.ts",
          "parser": "@typescript-eslint/parser",
          "parserOptions": {
              "project": ["tsconfig.json", "tests/tsconfig.json"]
          },
          "plugins": ["@typescript-eslint"],
          "extends": [
              "plugin:@typescript-eslint/recommended",
              "plugin:@typescript-eslint/recommended-requiring-type-checking"
          ]
      }
  ]
}