Lint Rules

noConfusingLabels (since v12.0.0)

This rule is recommended by Rome.

Disallow labeled statements that are not loops.

Labeled statements in JavaScript are used in conjunction with break and continue to control flow around multiple loops. Their use for other statements is suspicious and unfamiliar.

Source: https://eslint.org/docs/latest/rules/no-labels

Examples

Invalid

label: f();
suspicious/noConfusingLabels.js:1:1 lint/suspicious/noConfusingLabels ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   Unexpected label.
  
  > 1 │ label: f();
   ^^^^^
    2 │ 
  
   Only loops should be labeled.
    The use of labels for other statements is suspicious and unfamiliar.
  
label: {
    f();
    break label;
}
suspicious/noConfusingLabels.js:1:1 lint/suspicious/noConfusingLabels ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   Unexpected label.
  
  > 1 │ label: {
   ^^^^^
    2 │     f();
    3 │     break label;
  
   Only loops should be labeled.
    The use of labels for other statements is suspicious and unfamiliar.
  
label: if (a) {
    f()
    break label;
}
suspicious/noConfusingLabels.js:1:1 lint/suspicious/noConfusingLabels ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   Unexpected label.
  
  > 1 │ label: if (a) {
   ^^^^^
    2 │     f()
    3 │     break label;
  
   Only loops should be labeled.
    The use of labels for other statements is suspicious and unfamiliar.
  
label: switch (a) {
    case 0:
        break label;
}
suspicious/noConfusingLabels.js:1:1 lint/suspicious/noConfusingLabels ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   Unexpected label.
  
  > 1 │ label: switch (a) {
   ^^^^^
    2 │     case 0:
    3 │         break label;
  
   Only loops should be labeled.
    The use of labels for other statements is suspicious and unfamiliar.
  

Valid

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