Failing to browse React application deployed to Heroku

Question

When wirite https://tictactoesko.herokuapp.com/ in a browser then I recive folowing error message:

Failed to compile ./src/index.js Module build failed: Error: Cannot find module 'eslint/lib/formatters/stylish'

My index.js look like this import React from 'react' import ReactDOM from 'react-dom' import './index.css' import Game from './Game'

ReactDOM.render(, document.getElementById('root'))

My package.json looks like this

{
  "name": "tic-tac-toe",
  "version": "0.1.0",
  "private": true,
  "eslintConfig": {
    "env": {
      "es6": true
    },
    "parserOptions": {
      "ecmaVersion": 8,
      "sourceType": "module",
      "ecmaFeatures": {
        "jsx": true
      }
    },
    "extends": [
      "standard",
      "react-app",
      "plugin:jsx-a11y/recommended" 
    ],
    "plugins": [
      "jsx-a11y",
      "react"
      ],
    "rules": {
      "no-trailing-spaces": "off",
      "padded-blocks":"off",
      "jsx-a11y/href-no-hash":"off"
   }
  },
  "jest": {
    "testMatch": [
      "**/test/**/*.js?(x)"
    ],
    "collectCoverage": true,
    "coverageDirectory": "coverage",
    "coverageThreshold": {
      "global": {
        "branches": 100,
        "functions": 100,
        "lines": 100,
        "statements": 100
      }
    }
  },
  "dependencies": {
    "chromedriver": "^2.35.0",
    "jest-cli": "^22.3.0",
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "react-scripts": "1.1.1",
    "selenium-webdriver": "^4.0.0-alpha.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "lint": "./node_modules/.bin/eslint  src/** test/** ",
    "test": "jest",
    "eject": "react-scripts eject",
    "cypress:open": "cypress open"
  },
  "devDependencies": {
    "babel-eslint": "^7.2.3",
    "babel-jest": "^22.2.2",
    "babel-preset-env": "^1.6.1",
    "babel-preset-react": "^6.24.1",
    "cypress": "^2.0.3",
    "enzyme": "^3.3.0",
    "enzyme-adapter-react-16": "^1.1.1",
    "eslint": "^4.18.1",
    "eslint-config-google": "^0.9.1",
    "eslint-config-react-app": "^2.1.0",
    "eslint-config-standard": "^11.0.0",
    "eslint-plugin-flowtype": "^2.46.1",
    "eslint-plugin-import": "^2.9.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-node": "^6.0.1",
    "eslint-plugin-promise": "^3.6.0",
    "eslint-plugin-react": "^7.7.0",
    "eslint-plugin-standard": "^3.0.1",
    "jest": "^22.3.0",
    "react-test-renderer": "^16.2.0"
  }
}

Here is the travis.yml language: node_js node_js: - node addons: sonarcloud: before_script: - npm start -- --silent & script: - npm run lint - npm test - sonar-scanner -Dsonar.projectKey=TicTacToe -Dsonar.organization=steinko-github -Dsonar.sources=src,test -Dsonar.host.url= https://sonarcloud.io -Dsonar.login=6472ac35c070752487408fd8c946cca6b536eec2 -Dsonar.javascript.lcov.reportPaths=coverage/lcov.info - $(npm bin)/cypress run --record --key a1319fd9-2c6e-4888-8f02-e62f02b5001b deploy: provider: heroku
api_key: secure: 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 app: tictactoesko

And the deployment log feom Heroku looks like this Building dependencies Installing node modules (package.json + package-lock) up to date in 11.521s -----> Caching build Clearing previous node cache Saving 2 cacheDirectories (default): - node_modules - bower_components (nothing to cache) -----> Build succeeded! -----> Discovering process types Procfile declares types -> (none) Default types for buildpack -> web -----> Compressing... Done: 57.4M -----> Launching... Released v11 https://tictactoesko.herokuapp.com/ deployed to Heroku

When wirite https://tictactoesko.herokuapp.com/ in a browser then I recive folowing error message:

Failed to compile ./src/index.js Module build failed: Error: Cannot find module 'eslint/lib/formatters/stylish' How could i correct this error?

Answer 1

You installed eslint manually and this can break things. You should uninstall it and edit just your .eslintrc file. Look the comments of @gaearon in this Github issue

But if you wish to control directly and customize everything. I would eject the project: npm run eject . Check the guide of Create React App .