Chaining the assignment of variables can lead to unexpected results and be difficult to read.
(function() {
const foo = bar = 0; // Did you mean `foo = bar == 0`?
bar = 1; // This will not fail since `bar` is not constant.
})();
console.log(bar); // This will output 1 since `bar` is not scoped.
This rule disallows using multiple assignments within a single statement.
Examples of incorrect code for this rule:
/*eslint no-multi-assign: "error"*/
var a = b = c = 5;
const foo = bar = "baz";
let a =
b =
c;
Examples of correct code for this rule:
/*eslint no-multi-assign: "error"*/
var a = 5;
var b = 5;
var c = 5;
const foo = "baz";
const bar = "baz";
let a = c;
let b = c;