eslint/no-extra-label Style

🛠️ An auto-fix is available for this rule.

What it does

Disallow unnecessary labels.

Why is this bad?

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

A: while (a) {
  break A;
}

You can achieve the same result by removing the label and using break or continue without a label. Probably those labels would confuse developers because they expect labels to jump to further.

Examples

Examples of incorrect code for this rule:

A: while (a) {
  break A;
}

B: for (let i = 0; i < 10; ++i) {
  break B;
}

C: switch (a) {
  case 0:
    break C;
}

Examples of correct code for this rule:

while (a) {
  break;
}

for (let i = 0; i < 10; ++i) {
  break;
}

switch (a) {
  case 0:
    break;
}

A: {
  break A;
}

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

C: switch (a) {
  case 0:
    while (b) {
      break C;
    }
    break;
}

How to use

To enable this rule in the CLI or using the config file, you can use:

CLI

oxlint --deny no-extra-label

Config (.oxlintrc.json)

{
  "rules": {
    "no-extra-label": "error"
  }
}

References

• Rule Source