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按位与赋值(&=) - JavaScript | MDN

按位与赋值(&=)

Baseline Widely available

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
let a = 5; // 00000000000000000000000000000101
a &= 3; // 00000000000000000000000000000011

console.log(a); // 00000000000000000000000000000001
// Expected output: 1
语法 示例 使用按位与赋值
let a = 5;
// 5:     00000000000000000000000000000101
// 2:     00000000000000000000000000000010
a &= 2; // 0
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