javascript - javascript if或statement

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我有以下代码：

if (insurance != ("amica" || "travelers" || "national general" || "infinity" || "cincinatti")) {
    amount = "$200";
} else {
    amount = "$300";
}

我试图让我的网页显示出来，如果不是上述五家公司之一，那么您会得到200美元。

不幸的是，我似乎无法使其正常工作。我用几种不同的方式写
我已开始
if (insurance === "amica || insurance === "travelers || ...，但似乎没有任何作用。

我究竟做错了什么？

最佳答案

当您这样做时：

if (insurance != ("amica" || "travelers" || "national general" || "infinity" || "cincinatti"))

首先评估("amica" || "travelers" || "national general" || "infinity" || "cincinatti")，然后检查它是否与保险价值不同。

我想你想做：

if (insurance != "amica" && insurance != "travelers" && insurance != "national general" && insurance != "infinity" && insurance != "cincinatti")

这也可以通过定义一个数组并检查它是否包含该值来解决：

const insurances = ["amica", "travelers", "national general",
"infinity", "cincinatti"];

if (!insurances.includes(insurance))