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取余赋值（%=）
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
取余赋值（%=）运算符将变量除以右操作数的值，并将余数赋值给该变量。
尝试一下
let a = 3;console.log((a %= 2));// Expected output: 1console.log((a %= 0));// Expected output: NaNconsole.log((a %= "hello"));// Expected output: NaN语法
js
x %= y // x = x % y示例
使用取余赋值
js
let bar = 5;bar %= 2; // 1bar %= "foo"; // NaNbar %= 0; // NaN规范
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-assignment-operators |