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 warnings:

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

The following patterns are considered okay and do not cause warnings:

// 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;
  }
}

Further Reading

‘{a}’ is a statement label

Version

This rule was introduced in ESLint 0.0.9.

Resources