按位或赋值(|=)

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.

按位或赋值|=) 运算符使用两个操作数的二进制表示,对它们执行按位或运算并将结果分配给变量。

尝试一下

语法

js
x |= y // x = x | y

示例

使用按位或赋值

js
let a = 5;
a |= 2; // 7
// 5: 00000000000000000000000000000101
// 2: 00000000000000000000000000000010
// -----------------------------------
// 7: 00000000000000000000000000000111

规范

Specification
ECMAScript Language Specification
# sec-assignment-operators

浏览器兼容性

BCD tables only load in the browser

参见