HTML: Markup language
CSS: Styling language
JavaScript: Scripting language
Web APIs: Programming interfaces
All web technology
Learn web development
Discover our tools
Get to know MDN better
此页面由社区从英文翻译而来。了解更多并加入 MDN Web Docs 社区。
View in English Always switch to English
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
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。
&=
let a = 5; // 00000000000000000000000000000101 a &= 3; // 00000000000000000000000000000011 console.log(a); // 00000000000000000000000000000001 // Expected output: 1
x &= y // x = x & y
let a = 5; // 5: 00000000000000000000000000000101 // 2: 00000000000000000000000000000010 a &= 2; // 0
Enable JavaScript to view this browser compatibility table.