Question 1

How do I start using eslint-plugin-fp in an existing project?

Accepted Answer

Begin by enabling the recommended configuration and fixing errors incrementally; you can also disable specific rules in your ESLint config to ease the transition, as shown in the README's example.

Question 2

What's the difference between eslint-plugin-fp and eslint-plugin-immutable?

Accepted Answer

eslint-plugin-fp is broader, enforcing side effects and imperative constructs beyond just immutability, while eslint-plugin-immutable focuses primarily on preventing mutation. Choose based on whether you need comprehensive FP rules or a lighter approach.

Question 3

How can I handle errors without throw in eslint-plugin-fp?

Accepted Answer

Use functional error handling patterns like returning Result or Either types from libraries such as Folktale, which avoid side effects and align with FP principles enforced by the 'no-throw' rule.

Question 4

Does eslint-plugin-fp work with TypeScript or React?

Accepted Answer

Yes, but you may need additional ESLint plugins and configuration tweaks to handle TypeScript syntax or React components, as the rules target vanilla JavaScript and might conflict with framework-specific patterns.

Question 5

Can I disable only some rules in eslint-plugin-fp if they're too strict?

Accepted Answer

Absolutely, like any ESLint plugin, you can configure individual rules to 'warn' or 'off' in your config file, allowing customization for specific project needs without adopting the full strict set.

fp

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