Right shift 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.
Theright shift assignment (>>=) operator performsright shift on the two operands and assigns the result to the left operand.
Try it
let a = 5; // 00000000000000000000000000000101a >>= 2; // 00000000000000000000000000000001console.log(a);// Expected output: 1let b = -5; // 11111111111111111111111111111011b >>= 2; // 11111111111111111111111111111110console.log(b);// Expected output: -2Syntax
js
x >>= yDescription
x >>= y is equivalent tox = x >> y, except that the expressionx is only evaluated once.
Examples
Using right shift assignment
js
let a = 5; // (00000000000000000000000000000101)a >>= 2; // 1 (00000000000000000000000000000001)let b = -5; // (-00000000000000000000000000000101)b >>= 2; // -2 (-00000000000000000000000000000010)let c = 5n;c >>= 2n; // 1nSpecifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |