.eslintrc.js

const invalidCodeBlockRules = {
    // Invalid rules for embedded code-blocks
    "import/no-unresolved": "off",
    "no-undef": "off",
    "no-unused-expressions": "off",
    "no-unused-vars": "off",
    "no-unreachable": "off"
};

module.exports = {
    root: true,
    overrides: [
        {
            files: ["*.ts"],
            excludedFiles: ["*.md/*.ts"],
            parser: "@typescript-eslint/parser",
            parserOptions: {
                project: "tsconfig.eslint.json",
                sourceType: "module"
            },
            plugins: ["@typescript-eslint", "eslint-plugin"],
            extends: [
                "eslint:recommended",
                "airbnb-base",
                "airbnb-typescript/base",
                "plugin:eslint-plugin/rules-recommended",
                "plugin:@typescript-eslint/recommended",
                "plugin:@typescript-eslint/recommended-requiring-type-checking",
                "plugin:prettier/recommended"
            ]
        },
        {
            files: ["tests/**"],
            env: {
                "jest/globals": true
            },
            extends: [
                "plugin:jest/recommended",
                "plugin:jest/style",
                "plugin:eslint-plugin/tests-recommended"
            ],
            plugins: ["jest"],
            rules: {
                "import/no-extraneous-dependencies": [
                    "error",
                    { devDependencies: true }
                ],
                "no-console": "off",
                "@typescript-eslint/no-non-null-assertion": "off" // Tests should throw errors, jest will catch them
            }
        },
        {
            files: ["*.js"],
            excludedFiles: ["*.json"],
            extends: [
                "eslint:recommended",
                "airbnb-base",
                "plugin:prettier/recommended"
            ]
        },
        {
            files: ["*.md"],
            extends: ["plugin:mdx/recommended"],
            settings: {
                "mdx/code-blocks": true
            }
        },
        {
            // Markdown JS code-blocks (virtual filepath)
            files: ["**/*.md/*.js"],
            rules: {
                ...invalidCodeBlockRules
            }
        }
    ]
};