no-octal.md

Pattern: Use of octal escape sequence

Issue: -

Description

This rule reports octal escapes.

\0 matches the NUL character. However, if \0 is followed by another digit, it will become an octal escape sequence (e.g. \07).

Octal escapes can also easily be confused with backreferences. The same character sequence (e.g. \3) can either escape a character or be a backreference depending on the number of capturing groups in the pattern.

Examples

/* eslint regexp/no-octal: "error" */
/* ✓ GOOD */
var foo = /\0/;
var foo = /=/;
var foo = /(a)\1/;

/* ✗ BAD */
var foo = /\075/;
var foo = /\1/;