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Rslint

    no-regex-spaces

    Configuration

    PresetConfigured Value
    ✅ js.configs.recommended"error"
    rslint.config.ts
    import { defineConfig, js } from '@rslint/core';

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

    Rule Details

    Disallow multiple spaces in regular expressions. Two or more consecutive space characters are hard to count by eye; an explicit {n} quantifier expresses the same pattern unambiguously. The rule applies to both regex literals and the RegExp / new RegExp constructors (skipped when RegExp is shadowed in the enclosing scope or when the flags argument cannot be statically determined). Consecutive spaces inside character classes ([...]) are intentionally allowed and not reported.

    Examples of incorrect code for this rule:

    var re = /foo   bar/;
var re = new RegExp('foo   bar');

    Examples of correct code for this rule:

    var re = /foo {3}bar/;
var re = new RegExp('foo {3}bar');
var re = /[  ]/;

    Autofix

    When the parsed pattern and the raw source text agree (typically any regex literal, and RegExp / new RegExp calls whose pattern string contains no escape sequences), the rule rewrites into {n}. When the pattern contains escape sequences that differ from the raw source (e.g. new RegExp('\\d ')), the rule reports but does not autofix — the index into the parsed pattern would not map cleanly back to source positions.

    Original Documentation