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.
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; // 00000000000000000000000000000101
a >>= 2; // 00000000000000000000000000000001
console.log(a);
// Expected output: 1
let b = -5; // 11111111111111111111111111111011
b >>= 2; // 11111111111111111111111111111110
console.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 |
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ECMAScript® 2025 Language Specification # sec-assignment-operators |
浏览器兼容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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Right shift assignment ( x >>= y ) |
Legend
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- Full support
- Full support
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