ESLint only target a specific directory (eslintrc, create-react-app)

Where you have written the script to run lint in package.json, there only mention the folders you want to target

scripts:{"lint": "eslint src public"}

Then if you want to ignore some type of files in the respective folders, you can mention in ESLint config file.

You need to do something like eslint src/**/*.js[x]. If you are running a webpack build(or precommit hook) that does linting check then add it within the scripts object inside package.json.

inside your .eslintrc.json

{
  "rules": {
    "quotes": [ 2, "double" ]
  },

  "overrides": [
    {
      "files": [ "src/**/*.js" ],
      "rules": {
        "quotes": [ 2, "single" ]
      }
    }
  ]
}

in .eslintignore

 /someFolder
 /anotherFolder
 /oneMoreFolder

I used ignorePatterns option. It'll tell ESLint to ignore specific files and directories. It's useful when your IDE (ex. VS Code) is reporting errors in unwanted files.

{
  "ignorePatterns": ["gulpfile.js", "gulp/**/*", "webpack.config.js"]
}

You can Also use the .eslintignore file.