Skip to content

noConfusingLabels (since v1.0.0)

Diagnostic Category: lint/suspicious/noConfusingLabels

Sources:

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.

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