我最近有同样的问题。正则表达式使用ascii操作，因此不会识别特殊字符，如é或ß。您需要明确地将这些包含到您的正则表达式中。

I had the same problem recently. Regex operates with ascii, therefor special characters like é or ß are not recognized. You need to explicitely include those into your regex.

使用此：

Use this:

var regex = /[ée]po/gi;

提示：不要使用 new Regex（）它很慢，但直接声明正则表达式。这也解决了一些引用/转义问题。

Hint: Don't use new Regex() it's rather slow, but declare the regex directly instead. This also solves some quoting/escaping issues.