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

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® 2025 Language Specification
# sec-assignment-operators

浏览器兼容性

BCD tables only load in the browser

参见