.eslintrc.json

{
    "extends": ["airbnb"],
    "env": {
        "browser": true,
        "es6": true,
        "jest/globals": true
    },
    "parserOptions": {
        "ecmaVersion": 6,
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true,
            "classes": true,
            "jsx": true
        },
        "sourceType": "module"
    },
    "rules": {
        "jest/no-disabled-tests": "warn",
        "jest/no-focused-tests": "error",
        "jest/no-identical-title": "error",
        "jest/prefer-to-have-length": "warn",
        "jest/valid-expect": "error",
        
        "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
        "no-unused-vars": [1, { "argsIgnorePattern": "props|res|next|^err" }],
        
        "arrow-body-style": [2, "as-needed"]
    },
    "plugins": ["prettier", "react", "jest"]
}