此页面由社区从英文翻译而来。了解更多并加入 MDN Web Docs 社区。
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 2015年7月.
右移赋值运算符（>>=）将变量向右移动指定的位数，并将结果赋值给变量。
尝试一下
let a = 5; // 00000000000000000000000000000101a >>= 2; // 00000000000000000000000000000001console.log(a);// Expected output: 1let b = -5; // 11111111111111111111111111111011b >>= 2; // 11111111111111111111111111111110console.log(b);// Expected output: -2语法
js
x >>= y // x = x >> y示例
使用右移赋值
js
let a = 5; // (00000000000000000000000000000101)a >>= 2; // 1 (00000000000000000000000000000001)let b = -5; // (-00000000000000000000000000000101)b >>= 2; // -2 (-00000000000000000000000000000010)规范
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |