#array-type

#Configuration

import { defineConfig, ts } from '@rslint/core';

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/array-type': 'error',
    },
  },
]);

#Rule Details

Require consistently using either T[] or Array<T> for arrays. TypeScript provides two equivalent ways to define array types. This rule enforces a consistent style across the codebase.

The rule supports three modes via the default option: "array" (prefer T[]), "generic" (prefer Array<T>), and "array-simple" (prefer T[] for simple types, Array<T> for complex types). A separate readonly option controls readonly array syntax.

Examples of incorrect code for this rule (with default "array" option):

const a: Array<string> = [];
const b: ReadonlyArray<number> = [1, 2];
const c: Array<string | number> = [];

Examples of correct code for this rule (with default "array" option):

const a: string[] = [];
const b: readonly number[] = [1, 2];
const c: (string | number)[] = [];

#Original Documentation

• typescript-eslint array-type