no-label-var

Disallows labels that are variable names.

Rule Details

This rule aims to create clearer code by disallowing the bad practice of creating a label that shares a name with a variable that is in scope.

Examples of incorrect code for this rule:

/*eslint no-label-var: "error"*/

var x = foo;
function bar() {
x:
  for (;;) {
    break x;
  }
}

Examples of correct code for this rule:

/*eslint no-label-var: "error"*/

// The variable that has the same name as the label is not in scope.

function foo() {
  var q = t;
}

function bar() {
q:
  for(;;) {
    break q;
  }
}

When Not To Use It

If you don't want to be notified about usage of labels, then it's safe to disable this rule.

Version

This rule was introduced in ESLint 0.0.9.

Resources