ESLint config file specifies the folder. (Include only specified..., Disregard any other...)

Is there a way to configure the linting folder in the .eslintrc.json file rather than within the package.json?

package.json (snippet)

"scripts: {
  "lint": "eslint ./src --ext .js,.jsx,.ts,.tsx",
}

I'm interested in simplifying it to:

"scripts: {
  "lint": "eslint",
}

and setting the path and extensions in the .eslintrc.json file.

Alternatively, can I use the .eslintignore file to exclude everything except for the ./src folder when linting. I want to focus only on the src-folder and not the root directory. This requirement also extends to using the eslint plugin in vscode.

This is my current approach:

.eslintignore

/*
!/src

I find myself wondering why there isn't an option in the configuration files to specify the folders to lint. I am searching for the most common and elegant solution, as I have not come across a similar discussion to address my issue.

javascripteslint

Answer №1

After implementing your solution using the .eslintignore file, I decided to simplify by adding the rules directly into my configuration file under the ignorePatterns option (.eslintrc.cjs). It's working flawlessly for me:

module.exports = {
  ignorePatterns: ['/*', '!/src']
  [...]
}

Answer №2

Located within overrides in the file .eslintrc.json

If you provided directories through CLI (e.g., eslint lib), ESLint will search for target files to lint in those directories. The target files can be *.js files or files that match any of the overrides entries (excluding entries that are files ending with *).

{
  "rules": {
    "quotes": ["error", "double"]
  },

  "overrides": [
    {
      "files": ["bin/*.js", "lib/*.js"],
      "excludedFiles": "*.test.js",
      "rules": {
        "quotes": ["error", "single"]
      }
    }
  ]
}

For more information, see the documentation on Configuring ESLint

Answer №3

After receiving feedback from @billythetalented, I made a necessary adjustment in the package.json file by adding a dot:

"scripts": {
   "lint": "eslint .",
   ...
}

Without this change, the linting process was not working as expected

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