.eslintrc

{
    "parser": "@typescript-eslint/parser",
    "plugins": ["prettier", "@typescript-eslint", "react", "markdown", "unused-imports"],
    "extends": ["prettier", "plugin:react/recommended", "plugin:markdown/recommended"],
    "overrides": [
        {
            "files": ["**/*.md"],
            "processor": "markdown/markdown"
        },
        {
            "files": ["**.md/*.{ts,tsx,js,jsx}"],
            "rules": {
                "@typescript-eslint/no-unused-expressions": "off",
                "@typescript-eslint/no-unnecessary-type-arguments": "off",
                "@typescript-eslint/no-unnecessary-type-assertion": "off",
                "@typescript-eslint/no-unnecessary-type-constraint": "off",
                "@typescript-eslint/no-useless-constructor": "off",
                "@typescript-eslint/no-useless-empty-export": "off",
                "@typescript-eslint/no-unnecessary-qualifier": "off",
                "@typescript-eslint/prefer-includes": "off",
                "@typescript-eslint/prefer-nullish-coalescing": "off",
                "@typescript-eslint/prefer-optional-chain": "off",
                "@typescript-eslint/prefer-string-starts-ends-with": "off",
                "unused-imports/no-unused-imports": "off",
                "unused-imports/no-unused-vars": "off"
            }
        },
        {
            "files": ["*.{ts,tsx,js,jsx}"],
            "parserOptions": {
                "project": "./tsconfig.eslint.json",
                "ecmaFeatures": {
                    "jsx": true
                }
            },
            "excludedFiles": ["**/*.md/*.{ts,tsx,js,jsx}"]
        }
    ],
    "settings": {
        "react": {
            "version": "detect"
        }
    },
    "rules": {
        "quotes": ["error", "single"],
        "prettier/prettier": "error",
        "no-useless-return": "error",
        "no-unreachable": "error",
        "eqeqeq": "error",
        "no-else-return": "error",
        "no-extra-boolean-cast": "error",
        "no-implicit-coercion": "error",
        "no-lonely-if": "error",
        "no-unneeded-ternary": "error",
        "no-var": "error",
        "prefer-const": "error",
        "array-callback-return": "error",
        "constructor-super": "error",
        "getter-return": "error",
        "no-async-promise-executor": "error",
        "no-cond-assign": "error",
        "no-const-assign": "error",
        "no-constructor-return": "error",
        "no-control-regex": "error",
        "no-dupe-args": "error",
        "no-dupe-class-members": "error",
        "no-dupe-else-if": "error",
        "no-dupe-keys": "error",
        "no-duplicate-case": "error",
        "no-duplicate-imports": "error",
        "no-empty-character-class": "error",
        "no-empty-pattern": "error",
        "no-ex-assign": "error",
        "no-fallthrough": "error",
        "no-func-assign": "error",
        "no-import-assign": "error",
        "no-inner-declarations": "error",
        "no-invalid-regexp": "error",
        "no-irregular-whitespace": "error",
        "no-self-assign": "error",
        "no-self-compare": "error",
        "no-setter-return": "error",
        "object-curly-spacing": ["error", "always"],
        "padding-line-between-statements": [
            "error",
            { "blankLine": "always", "prev": "*", "next": "return" },
            { "blankLine": "always", "prev": ["const", "let", "var"], "next": "*"},
            { "blankLine": "any",    "prev": ["const", "let", "var"], "next": ["const", "let", "var"]},
            {
                "blankLine": "always",
                "prev": ["block", "block-like", "class", "directive", "export", "import", "multiline-block-like"],
                "next": "*"
            },
            { "blankLine": "any", "prev": ["export", "import"], "next": ["export", "import"]}
        ],

        // imports rules
        "no-unused-vars": "off",
        "unused-imports/no-unused-imports": "error",
        "unused-imports/no-unused-vars": "warn",

        // TS rules
        "@typescript-eslint/prefer-optional-chain": "error",
        "@typescript-eslint/no-unused-expressions": "error",
        "@typescript-eslint/no-unnecessary-type-arguments": "error",
        "@typescript-eslint/no-unnecessary-type-assertion": "error",
        "@typescript-eslint/no-unnecessary-type-constraint": "error",
        "@typescript-eslint/no-useless-constructor": "error",
        "@typescript-eslint/no-useless-empty-export": "error",
        "@typescript-eslint/prefer-enum-initializers": "error",
        "@typescript-eslint/no-unnecessary-qualifier": "error",
        "@typescript-eslint/prefer-includes": "error",
        "@typescript-eslint/prefer-nullish-coalescing": "off",
        "@typescript-eslint/prefer-string-starts-ends-with": "error",

        // React rules
        "react/prop-types": "off",
        "react/react-in-jsx-scope": "off",
        "jsx-quotes": ["error", "prefer-single"]
    }
}