noUselessLabel

Diagnostic Category: lint/complexity/noUselessLabel

JavaScript (and super languages)

Since: v1.0.0

Note

• This rule is recommended by Biome. A diagnostic error will appear when linting your code.
• This rule has a safe fix.

Sources:

• Same as: no-extra-label

Disallow unnecessary labels.

If a loop contains no nested loops or switches, labeling the loop is unnecessary.

Examples

Section titled Examples

Invalid

Section titled Invalid

loop: while(a) {
    break loop;
}

code-block.js:2:11 lint/complexity/noUselessLabel  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unnecessary label.
  
    1 │ loop: while(a) {
  > 2 │     break loop;
      │           ^^^^
    3 │ }
    4 │ 
  
  ℹ Safe fix: Remove the unnecessary label.
    You can achieve the same result without the label.
  
    2 │ ····break·loop;
      │          ----- 

Valid

Section titled Valid

outer: while(a) {
    while(b) {
        break outer;
    }
}

Related links

Section titled Related links

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