.eslintrc.json

{
  "extends": "eslint:recommended",
  "ignorePatterns": [
    "**/spec",
    "**/vendor",
    "**/node_modules",
    "sandbox",
    "core/doc",
    "tmp"
  ],
  "parserOptions": {
    "ecmaVersion": 2019
  },
  "env": {
    "es6": true,
    "browser": true,
    "jquery": true
  },
  "rules": {
    "block-scoped-var": 0,
    "camelcase": 0,
    "comma-dangle": 0,
    "comma-spacing": 0,
    "computed-property-spacing": 0,
    "consistent-return": 0,
    "default-case": 0,
    "dot-notation": 0,
    "eqeqeq": 0,
    "func-names": 0,
    "guard-for-in": 0,
    "indent": 0,
    "key-spacing": 0,
    "keyword-spacing": 0,
    "linebreak-style": ["error", "unix"],
    "max-len": 0,
    "new-cap": 0,
    "no-alert": 0,
    "no-bitwise": 0,
    "no-console": ["warn", {
        "allow": ["warn"]
    }],
    "no-else-return": 0,
    "no-extra-semi": "error",
    "no-global-assign": ["error", {
        "exceptions": ["Tabs"]
    }],
    "no-multi-spaces": 0,
    "no-multi-str": 0,
    "no-new": 0,
    "no-param-reassign": 0,
    "no-plusplus": 0,
    "no-redeclare": "error",
    "no-restricted-globals": 0,
    "no-restricted-syntax": 0,
    "no-shadow": 0,
    "no-undef": "error",
    "no-underscore-dangle": ["error", {
        "allow": ["_sync", "_this", "_flatpickr"]
    }],
    "no-unused-vars": ["error", {
        "vars": "all", "args": "none"
    }],
    "no-use-before-define": 0,
    "no-unused-expressions": 0,
    "no-var": 0,
    "one-var": 0,
    "one-var-declaration-per-line": 0,
    "object-curly-newline": 0,
    "object-curly-spacing": 0,
    "object-shorthand": 0,
    "operator-linebreak": 0,
    "prefer-arrow-callback": 0,
    "prefer-destructuring": 0,
    "prefer-rest-params": 0,
    "prefer-template": 0,
    "quote-props": 0,
    "quotes": 0,
    "radix": 0,
    "semi": 0,
    "space-before-function-paren": 0,
    "space-before-blocks": 0,
    "space-infix-ops": 0,
    "space-unary-ops": 0,
    "spaced-comment": 0,
    "strict": 0,
    "vars-on-top": 0,
    "wrap-iife": 0
  },
  "globals": {
    "_": "readonly",
    "accounting": "readonly",
    "addVariantFromStockLocation": "writable",
    "adjustShipmentItems": "writable",
    "Backbone": "readonly",
    "error": "writable",
    "flatpickr": "readonly",
    "Handlebars": "readonly",
    "HandlebarsTemplates": "readonly",
    "json": "writable",
    "message": "writable",
    "Select2": "readonly",
    "shipments": "writable",
    "show_flash": "writable",
    "Sortable": "readonly",
    "Spree": "readonly",
    "Turbolinks": "readonly",
    "update_state": "writable"
  }
}