Disallow Labels That Are Variables Names (no-label-var)

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.

The following patterns are considered problems:

/*eslint no-label-var: 2*/

var x = foo;
function bar() {
x:               /*error Found identifier with same name as label.*/
  for (;;) {
    break x;

The following patterns are not considered problems:

/*eslint no-label-var: 2*/

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

function foo() {
  var q = t;

function bar() {
  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.

Further Reading


This rule was introduced in ESLint 0.0.9.