除法分配 (/=)

除法赋值 (/=) 运算符对两个操作数执行 division 并将结果赋给左侧操作数。

¥The division assignment (/=) operator performs division on the two operands and assigns the result to the left operand.

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语法

¥Syntax

x /= y

描述

¥Description

x /= y 与 x = x / y 等效，只是表达式 x 仅计算一次。

¥x /= y is equivalent to x = x / y, except that the expression x is only evaluated once.

示例

¥Examples

使用数字进行除法分配

¥Division assignment using numbers

let bar = 5;

bar /= 2; // 2.5
bar /= 2; // 1.25
bar /= 0; // Infinity

其他非 BigInt 值被强制转换为数字：

¥Other non-BigInt values are coerced to numbers:

let bar = 5;
bar /= "2"; // 2.5
bar /= "foo"; // NaN

使用 BigInts

¥Division assignment using BigInts

let foo = 3n;
foo /= 2n; // 1n
foo /= 2n; // 0n

foo /= 0n; // RangeError: BigInt division by zero
foo /= 1; // TypeError: Cannot mix BigInt and other types, use explicit conversions

规范

Specification
ECMAScript Language Specification # sec-assignment-operators

¥Specifications

浏览器兼容性

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¥Browser compatibility

也可以看看

¥See also