# no-confusing-arrow

Disallow arrow functions where they could be confused with comparisons.

Arrow functions (=>) are similar in syntax to some comparison operators (>, <, <=, and >=). This rule warns against using the arrow function syntax in places where it could be confused with a comparison operator

Here's an example where the usage of => could be confusing:

// The intent is not clear
var x = a => 1 ? 2 : 3;
// Did the author mean this
var x = function (a) { return 1 ? 2 : 3 };
// Or this
var x = a >= 1 ? 2 : 3;

# Incorrect Code Examples

var x = a => 1 ? 2 : 3;
var x = (a) => 1 ? 2 : 3;

# Config

Name Type Description
allowParens bool Relaxes the rule and accepts parenthesis as a valid "confusion-preventing" syntax.
true by default.
More incorrect examples
a => 1 ? 2 : 3
var x = a => 1 ? 2 : 3
var x = (a) => 1 ? 2 : 3
More correct examples
a => { return 1 ? 2 : 3; }
var x = a => { return 1 ? 2 : 3; }
var x = (a) => { return 1 ? 2 : 3; }
var x = a => (1 ? 2 : 3)

Source (opens new window)

Last Updated: 11/18/2020, 9:36:33 PM