[FeatureRequest] limit number of function parameters

[vlio20]

It would be great to have an option to have a lint property which will error when the number of parameters exceeds the defined number:

max-num-of-params: 2

---

goo(a, b) {} // no error
foo(a, b, c) {} // error

[listepo-alterpost]

@vlio20 parameters-max-number

[JoshuaKGoldberg]

Tangentially related: #3849

[JoshuaKGoldberg]

StealingCopying @chelmertz's suggestion from #4203: it would be good to suggest using an object with named parameters once the limit is reached.

[lizzzp1]

I'd be into taking this - would like this rule as well :)

[ghost]

For context, ESLint supports this using 'max-params':
https://eslint.org/docs/rules/max-params

[JoshuaKGoldberg]

Somewhat relevant: TypeScript has a built-in refactoring to fix this! microsoft/TypeScript#23552

[JoshuaKGoldberg]

Note: per #4534, this issue will be closed in less than a month if no PR is sent to add the rule. If you really need the rule, custom rules are always an option and can be maintained outside this repo!

[JoshuaKGoldberg]

💀 It's time! 💀

TSLint is being deprecated and no longer accepting pull requests for new rules. See #4534. 😱

If you'd like to see this rule implemented, you have two choices:

• Recommended: Use typescript-eslint to lint your TypeScript code with ESLint ✅
• Legacy: Write it as a custom TSLint rule 🤷‍♂️

👋 It was a pleasure open sourcing with you!

If you believe this message was posted here in error, please comment so we can re-open the issue!

[JoshuaKGoldberg]

🤖 Beep boop! 👉 TSLint is deprecated 👈 (#4534) and you should switch to typescript-eslint! 🤖

🔒 This issue is being locked to prevent further unnecessary discussions. Thank you! 👋