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

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 Language Specification
# sec-assignment-operators

浏览器兼容性

BCD tables only load in the browser

参考