regexControlCharacterEscapes

Reports control characters that are not escaped using standard escape sequences.

✅ This rule is included in the ts logical and logicalStrict presets.

Enforces consistent escaping of control characters in regular expressions by requiring standard escape sequences (\0, \t, \n, \v, \f, \r) instead of hex, unicode, or control character escapes.

Examples

Hex Escapes

❌ Incorre

AEconsB0patteAE< =sp ansty="le--0:#5CA7E4;--1:#3A68">81<1/sp ansty="le--0:#F78C6C;--1:#AA09">82\x<0asp ansty="le--0:#D9F5DD;--1:#1111">1<1/sp ansty="le--0:#D6DEEB;--1:#403F">5<3;d ivclassNa="meco">

44AEco61B0pat446<88F spans="tyle--0:#D9F5DD;--1:#11">1<111/ spans="tyle--0:#82AAFF;--1:#3B">611<111/ spans="tyle--0:#D6DEEB;--1:#40">3<\n/>

Unicode Escapes

❌ Incorre

AEconsB0patteAE< =sp ansty="le--0:#5CA7E4;--1:#3A68">81<1/sp ansty="le--0:#F78C6C;--1:#AA09">82\u00<0asp ansty="le--0:#D9F5DD;--1:#1111">1<1/sp ansty="le--0:#D6DEEB;--1:#403F">5<3;d ivclassNa="meco">

44AEco61B0pat446<88F spans="tyle--0:#D9F5DD;--1:#11">1<111/ spans="tyle--0:#82AAFF;--1:#3B">611<111/ spans="tyle--0:#D6DEEB;--1:#40">3<\n/>

Control Character Escapes

❌ Incorre

AEconsB0patteAE< =sp ansty="le--0:#5CA7E4;--1:#3A68">81<1/sp ansty="le--0:#82AAFF;--1:#3B61">B0\1<1/sp ansty="le--0:#D6DEEB;--1:#403F">5<3;d ivclassNa="meco">

44AEco61B0pat446<88F spans="tyle--0:#D9F5DD;--1:#11">1<111/ spans="tyle--0:#82AAFF;--1:#3B">611<111/ spans="tyle--0:#D6DEEB;--1:#40">3<\n/>

Unicode Code Point Escapes

❌ Incorre

AEconsB0patteAE< =sp ansty="le--0:#5CA7E4;--1:#3A68">81<1/sp ansty="le--0:#F78C6C;--1:#AA09">82<\usp ansty="le--0:#5CA7E4;--1:#3A68">8F{1<1/sp ansty="le--0:#5CA7E4;--1:#3A68">85<3;d ivclassNa="meco">

44AEco61B0pat446<88F spans="tyle--0:#D9F5DD;--1:#11">1<111/ spans="tyle--0:#82AAFF;--1:#3B">611<111/ spans="tyle--0:#5CA7E4;--1:#3A">6<88Fu spans="tyle--0:#D6DEEB;--1:#40">3

Options

This rule is not configurable.

When Not To Use It

If your codebase has an established convention of using hex or unicode escapes for control characters, or if you need consistency with generated code that uses these formats, you may disable this rule.

Further Reading

• MDN: Character escape
• MDN: Regular expressions

Equivalents in Other Linters

• ESLint: regexp/control-character-escape