#no-unnecessary-slice-end

#Configuration

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

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

#Rule Details

Remove a redundant .length, Infinity, or Number.POSITIVE_INFINITY end argument from a two-argument slice call. Arrays, strings, and typed arrays are supported.

The length must refer to the same receiver. Optional member access is supported, while optional calls, computed method names, and spread arguments are not changed.

Examples of incorrect code:

const copy = array.slice(1, array.length);

Examples of correct code:

const copy = array.slice(1);

#Options

This rule has no options. It is enabled at error severity in unicornPlugin.configs.recommended.

#Differences from upstream

Locally shadowed, disabled, or previously reassigned Infinity and Number globals are not assumed to be built-ins. When type information proves that the receiver is not an array, string, or typed array, the call is also left alone. For .length rewrites, the shared slice/splice safety helper also requires a repeatable receiver and a simple side-effect-free first argument; more complex first-argument expressions are conservatively left unchanged. These guards avoid semantics-changing autofixes that Unicorn v75.0.0 can still offer.

#Original Documentation

• eslint-plugin-unicorn: no-unnecessary-slice-end
• Source code