Bitwise XOR assignment (^=)
BaselineWidely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Thebitwise XOR assignment (^=) operator performsbitwise XOR on the two operands and assigns the result to the left operand.
Try it
let a = 5; // 00000000000000000000000000000101a ^= 3; // 00000000000000000000000000000011console.log(a); // 00000000000000000000000000000110// Expected output: 6Syntax
js
x ^= yDescription
x ^= y is equivalent tox = x ^ y, except that the expressionx is only evaluated once.
Examples
Using bitwise XOR assignment
js
let a = 5; // (00000000000000000000000000000101)a ^= 3; // (00000000000000000000000000000011)console.log(a); // 6 (00000000000000000000000000000110)let b = 5; // (00000000000000000000000000000101)b ^= 0; // (00000000000000000000000000000000)console.log(b); // 5 (00000000000000000000000000000101)let c = 5n;c ^= 3n;console.log(c); // 6nSpecifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |