noUnusedLabels

诊断类别：lint/correctness/noUnusedLabels

¥Diagnostic Category: lint/correctness/noUnusedLabels

JavaScript (and super languages)

自从：v1.0.0

¥Since: v1.0.0

来源：

¥Sources:

与以下相同：no-unused-labels

¥Same as: no-unused-labels

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

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

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

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

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

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

noUnusedLabels

示例

无效

有效

相关链接