无符号右移赋值 (>>>=)

无符号右移赋值 (>>>=) 运算符对两个操作数执行 无符号右移 并将结果赋给左操作数。

¥The unsigned right shift assignment (>>>=) operator performs unsigned right shift on the two operands and assigns the result to the left operand.

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语法

¥Syntax

js
x >>>= y

描述

¥Description

x >>>= y 与 x = x >>> y 等效，只是表达式 x 仅计算一次。

¥x >>>= y is equivalent to x = x >>> y, except that the expression x is only evaluated once.

示例

¥Examples

使用无符号右移赋值

¥Using unsigned right shift assignment

js
let a = 5; // (00000000000000000000000000000101)
a >>>= 2; // 1 (00000000000000000000000000000001)

let b = -5; // (-00000000000000000000000000000101)
b >>>= 2; // 1073741822 (00111111111111111111111111111110)

let c = 5n;
c >>>= 2n; // 1n

规范

Specification
ECMAScript Language Specification
# sec-assignment-operators

¥Specifications

浏览器兼容性

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¥Browser compatibility

也可以看看

¥See also