noUnusedLabels

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/correctness/noUnusedLabels

¥Diagnostic Category: lint/correctness/noUnusedLabels
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则包含 safe 修复程序。

¥This rule has a safe fix.
此规则的默认严重级别为 warning。

¥The default severity of this rule is warning.
来源：

¥Sources:
- 与 no-unused-labels 相同
  
  ¥Same as no-unused-labels

如何配置

¥How to configure

1
{
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  "linter": {
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    "rules": {
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      "correctness": {
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        "noUnusedLabels": "error"
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      }
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    }
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  }
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}

描述

¥Description

禁止未使用的标签。

¥Disallow unused labels.

声明但从未使用的标签很可能是由于重构不完整而导致的错误。

¥Labels that are declared and never used are most likely an error due to incomplete refactoring.

该规则忽略 Svelte 组件中的反应式 Svelte 语句。

¥The rule ignores reactive Svelte statements in Svelte components.

示例

¥Examples

无效

¥Invalid

1
LOOP: for (const x of xs) {
2
    if (x > 0) {
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        break;
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    }
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    f(x);
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}

code-block.js:1:1 lint/correctness/noUnusedLabels  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Unused label.
  
  > 1 │ LOOP: for (const x of xs) {
      │ ^^^^
    2 │     if (x > 0) {
    3 │         break;
  
  ℹ The label is not used by any break statement and continue statement.
  
  ℹ Safe fix: Remove the unused label.
  
    1 │ LOOP:·for·(const·x·of·xs)·{
      │ ------

有效

¥Valid

1
LOOP: for (const x of xs) {
2
    if (x > 0) {
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        break LOOP;
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    }
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    f(x);
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}

1
function nonNegative(n) {
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    DEV: assert(n >= 0);
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    return n;
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}

1
<script>
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$: { /* reactive block */ }
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</script>

noUnusedLabels

摘要

如何配置

描述

示例

无效

有效

相关链接