Math.expm1()
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.
Math.expm1()
函数返回 E^x - 1
, 其中 x
是该函数的参数,E
是自然对数的底数 2.718281828459045
。
语法
Math.expm1(x)
参数
x
-
任意数字。
描述
参数 x
会被自动类型转换成 number
类型。
expm1
是 "exponent minus 1" 的缩写。
示例
js
Math.expm1(-Infinity); // -1
Math.expm1(-1); // -0.6321205588285577
Math.expm1(-0); // -0
Math.expm1(0); // 0
Math.expm1(1); // 1.718281828459045
Math.expm1(Infinity); // Infinity
规范
Specification |
---|
ECMAScript® 2025 Language Specification # sec-math.expm1 |
浏览器兼容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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expm1 |
Legend
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- Full support
- Full support
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参见
Math
对象。