#no-unnecessary-array-flat-depth

#Configuration

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

export default defineConfig([
  unicornPlugin.configs.recommended,
  {
    rules: {
      'unicorn/no-unnecessary-array-flat-depth': 'error',
    },
  },
]);

#Rule Details

Disallow passing 1 as the depth argument to Array#flat().

The default depth of Array#flat() is already 1, so writing the argument explicitly is redundant.

Examples of incorrect code for this rule:

const nested = [1, [2, 3]];
nested.flat(1);

Examples of correct code for this rule:

const nested = [1, [2, 3]];
nested.flat();

Depths other than the numeric literal 1 are left unchanged:

nested.flat(2);
nested.flat(Infinity);
nested.flat(depth);

#Original Documentation

• eslint-plugin-unicorn: no-unnecessary-array-flat-depth
• Source code