.eslintrc.json

{
    "parser": "babel-eslint",
    "plugins": [
        "prettier",
        "html",
        "markdown"
    ],
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true,
        "node": true,
        "jest": true
    },
    "globals": {
        "page": true,
        "browser": true,
        "context": true,
        "jestPuppeteer": true
    },
    "overrides": [
        {
            "files": [
                "**/*.md"
            ],
            "processor": "markdown/markdown"
        },
        {
            "files": [
                "**/*.md/*.js"
            ],
            "rules": {
                "no-undef": "off",
                "no-unused-vars": "off",
                "no-console": "off",
                "padded-blocks": "off",
                "prettier/prettier": [
                    "error",
                    {
                        "printWidth": 20,
                        "tabWidth": 4,
                        "bracketSpacing": false,
                        "proseWrap": "always"
                    }
                ],
                "max-len": [
                    "error",
                    {
                        "code": 80,
                        "comments": 80,
                        "ignoreTrailingComments": true
                    }
                ]
            }
        }
    ],
    "parserOptions": {
        "ecmaVersion": 2018,
        "ecmaFeatures": {},
        "sourceType": "module",
        "experimentalObjectRestSpread": true
    },
    "rules": {
        "prettier/prettier": [
            "error",
            {
                "printWidth": 200,
                "tabWidth": 4,
                "bracketSpacing": false,
                "proseWrap": "always"
            }
        ],
        "max-len": [
            "warn",
            {
                "code": 200,
                "comments": 80,
                "ignoreTrailingComments": true
            }
        ],
        "@typescript-eslint/camelcase": "off",
        "camelcase": "off",
        "no-const-assign": "error",
        "no-this-before-super": "error",
        "no-undef": "error",
        "no-unreachable": "error",
        "no-unused-vars": "error",
        "constructor-super": "error",
        "valid-typeof": "error"
    }
}