#no-octal

#Configuration

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

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-octal': 'error',
    },
  },
]);

#Rule Details

Disallows octal literals — integer numerals whose source form starts with a leading zero followed by another digit (e.g. 071, 00, 08). Octal numeric literals were deprecated in ECMAScript 5 and are forbidden in strict mode; the leading-zero notation has also been a long-standing source of confusion (08 is decimal 8, but 017 is decimal 15). Prefer the explicit 0o... octal notation introduced in ES2015.

Examples of incorrect code for this rule:

const num = 071;
const result = 5 + 07;
const leadingDigit = 08;
const leadingDecimal = 09.1;

Examples of correct code for this rule:

const num = "071";
const hex = 0x1234;
const binary = 0b101;
const modernOctal = 0o17;
const zero = 0;
const decimal = 0.1;

#Options

This rule has no options.

#Original Documentation

https://eslint.org/docs/latest/rules/no-octal