Question 1

How do I implement the generated ESLint rule?

Accepted Answer

Once you have built your custom rule using the generator, click the copy button to capture the JSON configuration. Simply navigate to your project's .eslintrc.json or .eslintrc.js file and paste the object under the 'rules' section. If the rule already exists, merge the new configuration carefully to ensure no conflicts occur.

After updating your configuration file, ensure you have the necessary ESLint version installed that supports the specific syntax you selected. Run your linting command in your terminal to see the immediate enforcement of the new code pattern across your repository.

Question 2

Does this tool save my code or configuration?

Accepted Answer

This application operates entirely in your browser's memory. It does not utilize cookies, localStorage, indexedDB, or server-side database storage. Every configuration you create is transient and will be cleared if you refresh the browser window.

This approach ensures maximum privacy and security for your development workflow. Since no data is transmitted to an external server or saved on your machine, you can safely use proprietary code snippets or project-specific configurations without concerns about data leaks.

Question 3

What is the 'no-restricted-syntax' rule in ESLint?

Accepted Answer

The 'no-restricted-syntax' rule is a powerful ESLint feature that allows you to forbid specific syntax elements in your JavaScript or TypeScript code using ESTree selectors. It is effectively a way to write custom linter rules without needing to build a full-blown plugin package.

By defining an AST (Abstract Syntax Tree) selector, you can target anything from specific function calls to variable declarations. This tool makes it easier to construct these complex selectors and format them into valid, ready-to-use JSON objects for your configuration files.

Question 4

Can I test my regex patterns before finalizing the rule?

Accepted Answer

Yes, the tool includes a built-in validation sandbox that allows you to test your regex patterns against sample code snippets. This ensures that the rule you are about to enforce will correctly catch the intended problematic code without causing false positives.

You can input a snippet of your source code and the selector pattern; the tool will highlight matches instantly. This iterative process helps developers refine their AST selectors to be as precise as possible before deploying the rule to their team or production environment.

Free ESLint Regex Rule Generator & Validator