regexUnnecessaryNumericQuantifiers

Reports numeric quantifiers like '{n,n}' that can be simplified to '{n}'.

✅ This rule is included in the ts logical presets.

Reports numeric quantifiers like {n,n} where the minimum and maximum are the same, which can be simplified to {n}.

Examples

Simple Cases

❌ Incorrect

const pattern = /a{1,1}/;

const pattern = /a{42,42}/;

const pattern = /a{1,1}?/;

const pattern = /(?:ab){2,2}/;

✅ Correct

const pattern = /a{1}/;

const pattern = /a{42}/;

const pattern = /a{1}?/;

const pattern = /(?:ab){2}/;

Options

This rule is not configurable.

When Not To Use It

If you prefer to keep unnecessary numeric quantifiers for readability or organizational purposes, you might want to disable this rule.

Further Reading

• MDN: Quantifier
• MDN: Regular expressions

Equivalents in Other Linters

• ESLint: regexp/no-useless-two-nums-quantifier