eslint-plugin-no-one-letter-generics

Eslint plugin to ban the one-letter TypeScript generic types

Usage

Install it with your package manager

With npm:

npm i -D eslint-plugin-no-one-letter-generics

With pnpm:

pnpm add -D eslint-plugin-no-one-letter-generics

With yarn:

yarn add eslint-plugin-no-one-letter-generics --dev

{
	"plugins": ["no-one-letter-generics"],
	"rules": {
		"no-one-letter-generics/no-one-letter-generics": ["warn"]
	}
}

Incorrect examples ❌

interface Response<T> {
  data: T;
  error: string;
  loading: boolean;
}

function fetchPaginatedData<T, P, R>(endpoint: string, params: P): Promise<[T[], R]> {
  return fetch(endpoint, { params }).then(response => response.json());
}

Correct examples ✅

interface Response<Data> {
  data: Data;
  error: string;
  loading: boolean;
}

function fetchPaginatedData<Item, Params, MetaData>(
  endpoint: string, 
  params: Params
): Promise<[Item[], MetaData]> {
  return fetch(endpoint, { params }).then(response => response.json());
}