请注意，此方案在循环中使用正则表达式检测字符串尾部的字符是否空格，尽管使用正则表达式增加了一点性能负担，但它允许你根据浏览器定义空格字符列表，以保持简短和兼容性。

Although using a regex for this adds a bit of performance overhead, it lets you defer the list of whitespace characters to the browser for the sake of brevity and compatibility.

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交之前你最好检查一下你是否已经把所有的空格都填写好了。

You'd better check whether you have filled out all the blanks before you hand it in.

youdao

用户经常不确定是否应该在邮编中包含一个空格。

Users often are not sure if they should include a space in a postcode.

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