noUselessContinue

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/noUselessContinue`](/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 [**information**](/reference/diagnostics#information). ## How to configure ```json title="biome.json" { "linter": { "rules": { "complexity": { "noUselessContinue": "error" } } } }

## Description
Avoid using unnecessary `continue`.

## Examples

### Invalid

```js
loop: for (let i = 0; i < 5; i++) {
  continue loop;
}

<pre class="language-text"><code class="language-text">code-block.js:2:3 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 1 │ loop: for (let i = 0; i < 5; i++) { > 2 │ continue loop; │ ^^^^^^^^^^^^^^ 3 │ } 4 │ ℹ Safe fix: Delete the unnecessary continue statement 1 1 │ loop: for (let i = 0; i < 5; i++) { 2 │ - ··continue·loop; 3 2 │ } 4 3 │ </code></pre>

while (i--) {
  continue;
}

<pre class="language-text"><code class="language-text">code-block.js:2:3 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 1 │ while (i--) { > 2 │ continue; │ ^^^^^^^^^ 3 │ } 4 │ ℹ Safe fix: Delete the unnecessary continue statement 1 1 │ while (i--) { 2 │ - ··continue; 3 2 │ } 4 3 │ </code></pre>

while (1) {
  continue;
}

<pre class="language-text"><code class="language-text">code-block.js:2:3 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 1 │ while (1) { > 2 │ continue; │ ^^^^^^^^^ 3 │ } 4 │ ℹ Safe fix: Delete the unnecessary continue statement 1 1 │ while (1) { 2 │ - ··continue; 3 2 │ } 4 3 │ </code></pre>

for (let i = 0; i < 10; i++) {
  if (i > 5) {
    console.log("foo");
    continue;
  } else if (i >= 5 && i < 8) {
    console.log("test");
  } else {
    console.log("test");
  }
}

<pre class="language-text"><code class="language-text">code-block.js:4:5 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 2 │ if (i > 5) { 3 │ console.log("foo"); > 4 │ continue; │ ^^^^^^^^^ 5 │ } else if (i >= 5 && i < 8) { 6 │ console.log("test"); ℹ Safe fix: Delete the unnecessary continue statement 2 2 │ if (i > 5) { 3 3 │ console.log("foo"); 4 │ - ····continue; 5 4 │ } else if (i >= 5 && i < 8) { 6 5 │ console.log("test"); </code></pre>

for (let i = 0; i < 9; i++) {
  continue;
}

<pre class="language-text"><code class="language-text">code-block.js:2:3 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 1 │ for (let i = 0; i < 9; i++) { > 2 │ continue; │ ^^^^^^^^^ 3 │ } 4 │ ℹ Safe fix: Delete the unnecessary continue statement 1 1 │ for (let i = 0; i < 9; i++) { 2 │ - ··continue; 3 2 │ } 4 3 │ </code></pre>

test2: do {
	continue test2;
} while (true);

<pre class="language-text"><code class="language-text">code-block.js:2:2 <a href="https://biomejs.dev/linter/rules/no-useless-continue">lint/complexity/noUselessContinue</a> FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ Unnecessary continue statement 1 │ test2: do { > 2 │ continue test2; │ ^^^^^^^^^^^^^^^ 3 │ } while (true); 4 │ ℹ Safe fix: Delete the unnecessary continue statement 1 1 │ test2: do { 2 │ - → continue·test2; 3 2 │ } while (true); 4 3 │ </code></pre>

Valid

while (i) {
  if (i > 5) {
    continue;
  }
  console.log(i);
  i--;
}

loop: while (1) {
  forLoop: for (let i = 0; i < 5; i++) {
    if (someCondition) {
      continue loop;
    }
  }
}

</TabItem> </Tabs>

Valid

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