减法赋值(-=)

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.

减法赋值-=)运算符从变量中减去右操作数的值,并将结果赋值给该变量。

尝试一下

语法

js
x -= y // x = x - y

示例

使用减法赋值

js
let bar = 5;

bar -= 2; // 3
bar -= "foo"; // NaN

规范

Specification
ECMAScript Language Specification
# sec-assignment-operators

浏览器兼容性

BCD tables only load in the browser

参见