Bitwise XOR assignment (^=)
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The bitwise XOR assignment (^=) operator performs bitwise XOR on the two operands and assigns the result to the left operand.
Try it
let a = 5; // 00000000000000000000000000000101 a ^= 3; // 00000000000000000000000000000011 console.log(a); // 00000000000000000000000000000110 // Expected output: 6 Syntax
js
x ^= y Description
x ^= y is equivalent to x = x ^ y, except that the expression x 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); // 6n Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |
