noAdjacentSpacesInRegex

import { Tabs, TabItem } from '@astrojs/starlight/components';

<Tabs> <TabItem label="JavaScript (and super languages)" icon="seti:javascript"> ## Summary - Rule available since: `v1.0.0` - Diagnostic Category: [`lint/complexity/noAdjacentSpacesInRegex`](/reference/diagnostics#diagnostic-category) - This rule is **recommended**, meaning it is enabled by default. - This rule has a [**safe**](/linter/#safe-fixes) fix. - The default severity of this rule is [**warning**](/reference/diagnostics#warning). - Sources: - Same as [`no-regex-spaces`](https://eslint.org/docs/latest/rules/no-regex-spaces)

How to configure

json

{
	"linter": {
		"rules": {
			"complexity": {
				"noAdjacentSpacesInRegex": "error"
			}
		}
	}
}

Description

Disallow unclear usage of consecutive space characters in regular expression literals

Examples

Invalid

/   /

<pre class="language-text"><code class="language-text">code-block.js:1:2 <a href="https://biomejs.dev/linter/rules/no-adjacent-spaces-in-regex">lint/complexity/noAdjacentSpacesInRegex</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚠ This regular expression contains unclear uses of consecutive spaces. > 1 │ / / │ ^^^ 2 │ ℹ It's hard to visually count the amount of spaces. ℹ Safe fix: Use a quantifier instead. 1 │ - /···/ 1 │ + /·{3}/ 2 2 │ </code></pre>

/foo  */

/foo  {2,}bar   {3,5}baz/

<pre class="language-text"><code class="language-text">code-block.js:1:5 <a href="https://biomejs.dev/linter/rules/no-adjacent-spaces-in-regex">lint/complexity/noAdjacentSpacesInRegex</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚠ This regular expression contains unclear uses of consecutive spaces. > 1 │ /foo {2,}bar {3,5}baz/ │ ^^^^^^^^^^^^ 2 │ ℹ It's hard to visually count the amount of spaces. ℹ Safe fix: Use a quantifier instead. 1 │ - /foo··{2,}bar···{3,5}baz/ 1 │ + /foo·{3,}bar·{5,7}baz/ 2 2 │ </code></pre>

/foo [ba]r  b(a|z)/

<pre class="language-text"><code class="language-text">code-block.js:1:11 <a href="https://biomejs.dev/linter/rules/no-adjacent-spaces-in-regex">lint/complexity/noAdjacentSpacesInRegex</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚠ This regular expression contains unclear uses of consecutive spaces. > 1 │ /foo [ba]r b(a|z)/ │ ^^ 2 │ ℹ It's hard to visually count the amount of spaces. ℹ Safe fix: Use a quantifier instead. 1 │ - /foo·[ba]r··b(a|z)/ 1 │ + /foo·[ba]r·{2}b(a|z)/ 2 2 │ </code></pre>

Valid

/foo {2}bar/

/ foo bar baz /

/foo bar	baz/

</TabItem> </Tabs>

How to configure

Description

Examples

Invalid

Valid

Related links