.eslintrc.json

{
  "parser": "babel-eslint",
  "parserOptions": {
    "sourceType": "module",
    "allowImportExportEverywhere": false,
    "codeFrame": true,
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "plugins": [
    "react"
  ],
  "extends": [
    "plugin:prettier/recommended"
  ],
  "rules": {
    "react/jsx-sort-props": "error",
    "react/jsx-uses-react": "error",
    "react/jsx-uses-vars": "error",
    "consistent-return": "error",
    "no-debugger": "error",
    "no-invalid-regexp": "error",
    "no-undef": "error",
    "no-unused-expression": [
      0,
      "allow-fast-null-checks"
    ],
    "no-unused-vars": [
      "error",
      {
        "vars": "all",
        "args": "none",
        "ignoreRestSiblings": false
      }
    ],
    "no-var": "error",
    "prefer-const": "error",
    "semi": [
      2,
      "always"
    ],
    "strict": 0,
    // max length at 250 characters, ignores comments
    "max-len": [
      "warn",
      250,
      {
        "ignoreComments": true,
        "ignoreTrailingComments": true
      }
    ]
  },
  "globals": {
    "$ReadOnlyArray": false,
    "Blob": false,
    "Class": false,
    "ClipboardEvent": false,
    "Component": false,
    "DataTransferItem": false,
    "Document": true,
    "DragEvent": true,
    "Element": false,
    "Event": false,
    "EventTarget": false,
    "File": false,
    "FileReader": false,
    "HTMLElement": false,
    "HTMLLIElement": false,
    "HTMLTableElement": false,
    "Image": false,
    "KeyboardEvent": false,
    "Map": false,
    "MouseEvent": false,
    "MutationObserver": false,
    "Promise": false,
    "Set": false,
    "SyntheticEvent": false,
    "SyntheticInputEvent": false,
    "SyntheticMouseEvent": false,
    "cancelAnimationFrame": false,
    "clearTimeout": false,
    "console": false,
    "document": false,
    "requestAnimationFrame": false,
    "setTimeout": false,
    "window": false,
    "Intl": false,
    "WeakMap": false
  }
}