无符号右移赋值（>>>=）
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.
无符号右移赋值（>>>=）运算符向右移动移动指定（二进制）位数，并将结果赋值给变量。
尝试一下
let a = 5; // 00000000000000000000000000000101
a >>>= 2; // 00000000000000000000000000000001
console.log(a);
// Expected output: 1
let b = -5; // -00000000000000000000000000000101
b >>>= 2; // 00111111111111111111111111111110
console.log(b);
// Expected output: 1073741822
语法
js
x >>>= y // x = x >>> y
示例
使用无符号右移位赋值
js
let a = 5; // (00000000000000000000000000000101)
a >>>= 2; // 1 (00000000000000000000000000000001)
let b = -5; // (-00000000000000000000000000000101)
b >>>= 2; // 1073741822 (00111111111111111111111111111110)
规范
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |