Error when running eslint manually for default template project

Describe the bug

With a new project using the default template created via

npx create-react-app test-project

running eslint manually via script like

"scripts": {
  ...
  "lint": "eslint './{src,test}/**/*.js'"
}

throws the following error

davidlukerice$ npm run lint

> test-app@0.1.0 lint [...]]/test-app
> eslint './{src,test}/**/*.js'

Error: Failed to load parser '@typescript-eslint/parser' declared in 'package.json » eslint-config-react-app#overrides[0]': Cannot find module 'typescript'
Require stack:
- [...]]/test-app/node_modules/@typescript-eslint/typescript-estree/dist/parser.js
- [...]]/test-app/node_modules/@typescript-eslint/parser/dist/parser.js
- [...]]/test-app/node_modules/eslint/lib/cli-engine/config-array-factory.js
- [...]]/test-app/node_modules/eslint/lib/cli-engine/cascading-config-array-factory.js
- [...]]/test-app/node_modules/eslint/lib/cli-engine/cli-engine.js
- [...]]/test-app/node_modules/eslint/lib/cli-engine/index.js
- [...]]/test-app/node_modules/eslint/lib/cli.js
- [...]]/test-app/node_modules/eslint/bin/eslint.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:794:15)
    at Function.Module._load (internal/modules/cjs/loader.js:687:27)
    at Module.require (internal/modules/cjs/loader.js:849:19)
    at require ([...]]/test-app/node_modules/v8-compile-cache/v8-compile-cache.js:161:20)
    at Object.<anonymous> ([...]]/test-app/node_modules/@typescript-eslint/typescript-estree/dist/parser.js:17:25)
    at Module._compile ([...]]/test-app/node_modules/v8-compile-cache/v8-compile-cache.js:194:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:849:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! test-app@0.1.0 lint: `eslint './{src,test}/**/*.js'`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the test-app@0.1.0 lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Environment

davidlukerice$ npx create-react-app --info

Environment: OS: macOS 10.15.2 Node: 12.13.0 Yarn: 1.6.0 npm: 6.13.3 Watchman: 4.9.0 Xcode: Xcode 11.3 Build version 11C29 Android Studio: Not Found

Packages: (wanted => installed) react: ^16.12.0 => 16.12.0 react-dom: ^16.12.0 => 16.12.0 react-scripts: 3.3.0 => 3.3.0

Steps to reproduce

1. Create a new application
2. Add in "lint": "eslint './{src,test}/**/*.js'" command to package.json
3. Run the command with npm run lint
4. See the error

Expected behavior

It should lint fine and not throw an error about a typescript module

Actual behavior

Throws an error.

[davidlukerice]

I wouldn’t think I’d need to install typescript for a non typescript app.

[stale[bot]]

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