[eslint-config-react-app] Property "overrides" is the wrong type

Desribe the bug

When either trying to save a file or type some code in VSCode, you’ll get the following error back:

[Error - 4:41:56 PM] ESLint stack trace:
[Error - 4:41:56 PM] Error: ESLint configuration in .eslintrc.js » eslint-config-react-app is invalid:
	- Property "overrides" is the wrong type (expected array but got `{"files":["**/*.ts","**/*.tsx"],"parser":"@typescript-eslint/parser","parserOptions":{"ecmaVersion":2018,"sourceType":"module","ecmaFeatures":{"jsx":true},"warnOnUnsupportedTypeScriptVersion":true},"plugins":["@typescript-eslint"],"rules":{"default-case":"off","no-dupe-class-members":"off","@typescript-eslint/no-angle-bracket-type-assertion":"warn","no-array-constructor":"off","@typescript-eslint/no-array-constructor":"warn","@typescript-eslint/no-namespace":"error","no-unused-vars":"off","@typescript-eslint/no-unused-vars":["warn",{"args":"none","ignoreRestSiblings":true}],"no-useless-constructor":"off","@typescript-eslint/no-useless-constructor":"warn"}}`).

Did you try recovering your dependencies?

Yes, I did. But didn’t work. Even downgraded ESLint back to 5.16.0, same issue.

Which terms did you search for in User Guide?

Not using create-react-app. I’m using Gatsby here.

Environment

  System:
    OS: macOS 10.14.5
    CPU: (8) x64 Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 12.4.0 - /usr/local/bin/node
    Yarn: 1.17.0 - /usr/local/bin/yarn
    npm: 6.9.0 - /usr/local/bin/npm
  Browsers:
    Safari: 12.1.1
  npmPackages:
    gatsby: 2.8.4 => 2.8.4 
    gatsby-image: ^2.1.2 => 2.2.3 
    gatsby-plugin-flow: ^1.1.0 => 1.1.0 
    gatsby-plugin-intl: ^0.2.4 => 0.2.4 
    gatsby-plugin-manifest: ^2.1.1 => 2.2.0 
    gatsby-plugin-module-resolver: ^1.0.3 => 1.0.3 
    gatsby-plugin-offline: ^2.1.1 => 2.2.0 
    gatsby-plugin-react-helmet: ^3.0.12 => 3.1.0 
    gatsby-plugin-sharp: ^2.1.3 => 2.2.1 
    gatsby-plugin-styled-components: ^3.1.0 => 3.1.0 
    gatsby-source-directus7: ^0.8.0 => 0.8.0 
    gatsby-source-filesystem: ^2.0.38 => 2.1.1 
    gatsby-transformer-sharp: ^2.1.21 => 2.2.0 
  npmGlobalPackages:
    gatsby-cli: 2.6.3

// .eslintrc.js

module.exports = {
  globals: {
    __PATH_PREFIX__: true
  },
  extends: [
    "react-app",
    "airbnb",
    "prettier",
    "prettier/react",
    "prettier/flowtype"
  ],
  plugins: ["prettier", "flowtype"],
  rules: {
    "prettier/prettier": [
      "error",
      {
        semi: false,
        trailingComma: "es5",
        printWidth: 100,
        singleQuote: true
      }
    ],
    radix: ["error", "as-needed"],
    "no-console": ["error", { allow: ["error"] }],
    "global-require": "off",
    "jsx-a11y/label-has-associated-control": "off",
    "react/jsx-indent": "off",
    "react/destructuring-assignment": "off",
    "react/default-props-match-prop-types": "off",
    "react/jsx-one-expression-per-line": "off",
    "react/jsx-filename-extension": [
      1,
      {
        extensions: [".js"]
      }
    ],
    "react/prop-types": "off",
    "import/extensions": "off",
    "import/prefer-default-export": "off",
    "flowtype/boolean-style": [2, "boolean"],
    "flowtype/define-flow-type": 1,
    "flowtype/generic-spacing": [2, "never"],
    "flowtype/no-primitive-constructor-types": 2,
    "flowtype/no-types-missing-file-annotation": 2,
    "flowtype/object-type-delimiter": [2, "comma"],
    "flowtype/require-valid-file-annotation": 2,
    "flowtype/space-after-type-colon": [2, "always"],
    "flowtype/space-before-generic-bracket": [2, "never"],
    "flowtype/space-before-type-colon": [2, "never"],
    "flowtype/union-intersection-spacing": [2, "always"],
    "flowtype/use-flow-type": 1,
    "flowtype/valid-syntax": 1,
    "flowtype/type-id-match": [2, "^([A-Z]+[a-z0-9A-Z]*)$"],
    "flowtype/require-return-type": [
      2,
      "always",
      {
        annotateUndefined: "never",
        excludeArrowFunctions: "expressionsOnly"
      }
    ],
    "jsx-a11y/anchor-is-valid": [
      "error",
      {
        components: ["Link", "ButtonLink"],
        specialLink: ["to", "as"],
        aspects: ["noHref", "invalidHref", "preferButton"]
      }
    ]
  },
  settings: {
    "import/resolver": {
      "babel-module": {}
    },
    flowtype: {
      onlyFilesWithFlowAnnotation: false
    }
  }
};

Steps to reproduce

1. Install Gatsby and initiate a new Gatsby project
2. Follow these steps to add a custom .eslintrc.js to a Gatsby project

The error should pop right up if you use VSCode for example.

Expected behavior

No error and the code gets formatted.

Actual behavior

Error and the code does not get formatted. Currently nothing from the .eslintrc.js works.

Reproducible demo

Sadly, no reproducible demo, due to the issue being related to the ESLint plugin not create-react-app.

[baitun]

Solution for me was to downgrade eslint from version 6 back to 5 with npm i eslint@5.16.0

[kladnik]

I’m using ESLint 5.16.0 until it is updated. Works fine.