Module.exports causing keyword errors in eslint

Encountering some unusual errors from eslint CI regarding my jest.config.js file.

  1:1  error  Rule 'no-empty-label' has been replaced by: no-labels                 no-empty-label
  1:1  error  Rule 'no-reserved-keys' has been replaced by: quote-props             no-reserved-keys
  1:1  error  Rule 'space-after-keywords' has been replaced by: keyword-spacing     space-after-keywords
  1:1  error  Rule 'space-return-throw-case' has been replaced by: keyword-spacing  space-return-throw-case

Error messages seem to be related to a JavaScript keyword, but none is visible. Here's the complete content of jest.config.js:

/* global module */

module.exports = {
    roots: [
        '<rootDir>/src'
    ],
    collectCoverageFrom: [
        'src/**/*.{js,jsx,ts,tsx}',
        '!src/**/*.d.ts'
    ],
    setupFiles: [
        'react-app-polyfill/jsdom'
    ],
    setupFilesAfterEnv: [
        '<rootDir>/src/setupTests.js'
    ],
    testMatch: [
        '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
        '<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}'
    ],
    testEnvironment: 'jest-environment-jsdom-fourteen',
    testPathIgnorePatterns: [
        '<rootDir>/src/__tests__/specHelpers/',
        '<rootDir>/src/__tests__/mocks/'
    ],
    transform: {
        '^.+\\.(js|jsx|ts|tsx)$': 'babel-jest',
        '^.+\\.css$': '<rootDir>/config/jest/cssTransform.js',
        '^(?!.*\\.(js|jsx|ts|tsx|css|json)$)': '<rootDir>/config/jest/fileTransform.js'
    ],
    transformIgnorePatterns: [
        '[/\\\\]node_modules[/\\\\].+\\.(js|jsx|ts|tsx)$',
        '^.+\\.module\\.(css|sass|scss)$'
    ],
    modulePaths: [
        '<rootDir>/src'
    ],
    moduleNameMapper: {
        '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy'
    ],
    moduleFileExtensions: [
        'web.js',
        'js',
        'web.ts',
        'ts',
        'web.tsx',
        'tsx',
        'json',
        'web.jsx',
        'jsx',
        'node'
    ],
    watchPlugins: [
        'jest-watch-typeahead/filename',
        'jest-watch-typeahead/testname'
    ]
};

Is anyone able to pinpoint what the eslint errors are referring to?

Answer №1

When ESLint detects configuration errors, it highlights them as issues with the initial line of the files it scans. As pointed out by @sleepwalker, these errors are likely linked to your eslint config file (e.g. .eslingrc).

To identify the specific rule causing the failure, check out the documentation for: no-empty-label.

This particular rule comes with a warning:

The no-empty-label rule was deprecated in ESLint v2.0 and replaced by the no-labels rule.

In order to resolve this issue, follow the recommendations provided in the error message and update your ESLint configuration accordingly.

For instance:

-   "no-empty-label": "error"
+   "no-labels": ["error", { "allowLoop": true, "allowSwitch": true }]

It is also worth noting that these rules may be inherited from a configuration you're extending. Be sure to review, remove, override, or update that configuration if necessary.

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