# regexp/no-octal

disallow octal escape sequence

# 📖 Rule Details

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. E.g. the \2 in /(a)\2/ is a character but the \2 in /(a)(b)\2/ is a backreference. This can be a problem when refactoring regular expressions because an octal escape can become a backreference or vice versa.

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# 🔧 Options

Nothing.

# 🚀 Version

This rule was introduced in eslint-plugin-regexp v0.1.0

# 🔍 Implementation