按位与赋值(&=)

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.

按位与赋值运算符(&=)使用两个操作数的二进制表示,对它们进行按位与运算并将结果赋值给变量。

尝试一下

语法

js
x &= y // x = x & y

示例

使用按位与赋值

js
let a = 5;
// 5:     00000000000000000000000000000101
// 2:     00000000000000000000000000000010
a &= 2; // 0

规范

Specification
ECMAScript Language Specification
# sec-assignment-operators

浏览器兼容性

BCD tables only load in the browser

参见