如何使正则表达式匹配大小写? [英] How can I make a regular expression match upper and lower case?

问题描述

我对正则表达式一点也不了解，但是如果有人可以帮助我更改以下代码以允许使用小写字母a-z，那就太好了！

I don't really know much about regex at all, but if someone could help me change the following code to also allow for lowercase a-z, that would be great!

$("input.code").keyup(function(){
    this.value = this.value.match(/[A-Z]{3}([0-9]{1,4})?|[A-Z]{1,3}/)[0];
});

推荐答案

如果您希望正则表达式不区分大小写，请添加 i

If you want a regular expression to be case-insensitive, add a i modifier to the end of the regex. Like so:

/[A-Z]{3}([0-9]{1,4})?|[A-Z]{1,3}/i

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