typescript/no-unnecessary-type-parameters Nursery

💭 This rule requires type information.

Disallow type parameters that are declared but not meaningfully used.

Unnecessary type parameters make signatures noisier and harder to understand, and they often hide opportunities to simplify APIs.

Examples of incorrect code for this rule:

function parseYAML<T>(input: string): T {
  return input as any as T;
}

Examples of correct code for this rule:

function parseYAML(input: string): unknown {
  return input;
}

function identity<T>(value: T): T {
  return value;
}

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)CLI

json

{
  "rules": {
    "typescript/no-unnecessary-type-parameters": "error"
  }
}

bash

oxlint --type-aware --deny typescript/no-unnecessary-type-parameters