eslint-plugin-no-unused-type-properties

Standalone ESLint plugin providing the no-unused-type-properties rule.

Install

npm install --save-dev eslint eslint-plugin-no-unused-type-properties @typescript-eslint/parser

Usage (flat config)

import pluginNoUnusedTypeProperties from 'eslint-plugin-no-unused-type-properties'
import tsParser from '@typescript-eslint/parser'

export default [
  {
    files: ['**/*.ts'],
    languageOptions: {
      parser: tsParser,
    },
    plugins: {
      typeProps: pluginNoUnusedTypeProperties,
    },
    rules: {
      'typeProps/no-unused-type-properties': 'error',
    },
  },
]

Examples

Fails

interface User {
  id: string
  name: string
}

function greet({ id }: User) {
  return id
}

This reports name because it exists on User but is missing from the destructuring pattern.

interface RequestContext {
  user: {
    id: string
    name: string
  }
  traceId: string
}

function handle({ user: { id }, traceId }: RequestContext) {
  return id + traceId
}

This reports user.name because nested object patterns are checked too.

Passes

interface User {
  id: string
  name: string
}

function greet({ id, name }: User) {
  return id + name
}

interface User {
  id: string
  name: string
  email: string
}

const serialize = ({ id, ...rest }: User) => ({ id, rest })

Rest patterns are allowed because the remaining properties are still captured.