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Showing content from https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Math/atanh below:

Math.atanh() - JavaScript | MDN

Math.atanh()

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Math.atanh() 函数返回一个数值反双曲正切值,即:

∀ x ∊ ( - 1 , 1 ) , Math.atanh ( x ) = arctanh ( x ) = the unique y such that tanh ( y ) = x \forall x \in \left( -1, 1 \right), \mathtt{\operatorname{Math.atanh}(x)} = \operatorname{arctanh}(x) = \text{ the unique } ; y ; \text{such that} ; \tanh(y) = x 语法 参数 描述

由于 atanh() 是 Math 的静态方法,所以应该像这样使用:Math.atanh(),而不是作为你创建的 Math 实例的方法(Math 不是一个构造函数)。

示例 使用 Math.atanh()
Math.atanh(-2); // NaN
Math.atanh(-1); // -Infinity
Math.atanh(0); // 0
Math.atanh(0.5); // 0.5493061443340548
Math.atanh(1); // Infinity
Math.atanh(2); // NaN

对于大于 1 或是小于-1 的值,函数返回 NaN 。

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